While a lot of the smaller startups like Foursquare and Gowalla are getting much of the buzz at SXSW, Twitter isn’t sitting idly on the location sidelines. Sure, they launched location integration on their site a few days ago, but they’ve also apparently set up a sub-site totally around location for SXSW. But here’s the weird thing: It’s only for stalking their employees.

As co-founder Evan Williams tweeted out earlier, sxsw.twitter.com shows you a Google map of Austin, Texas (where SXSW is held) with tiny Twitter logos overlaid on it, showing Twitter employees at the conference tweeting.

The site, which is clearly tailored for mobile usage (it looks great on the iPhone, for example), has two areas: “Twitter People” and “To Meet.” The Twitter People area is the one that shows the map and the tweets overlaid on it. The To Meet area is interesting because it asks, “Which of these sound like awesome things to work on?” and gives you a few different options to click on.

For example, if you click on, “Making fast and sexy applications” it takes you to a list of various Twitter employees at SXSW that you should meet. If you click on “Partnering with Twitter,” you get a different list. Clearly, Twitter is using this site for both new employee recruitment, platform expansion, and partnership opportunities.

Twitter, while now fairly commonplace in the mainstream (especially the media), first rose to fame among early tech adopters during SXSW three years ago.

As I’ve made abundantly clear over the past several days, just about every service that has anything to do with location is launching something at the SXSW festival which starts tomorrow in Austin, Texas. Don’t believe me, here’s a small sampling (Foursquare, Gowalla, Loopt, Whrrl, Plancast, Brizzly, Twitter). So, how are you going to wrap your head around all this location data? SimpleGeo has an awesome way.

Vicarious.ly is a real-time location-based stream of information presented in a nice visual way. While the plan is to eventually launch one for many different cities around the U.S. and eventually the world, the first one is based around Austin, for SXSW. To make it, SimpleGeo partnered with BlockChalk, Brightkite, Bump Technologies, Flickr, Fwix, Foursquare, Gowalla, and Twitter to pull all of their location data and place it both in a constantly-updating stream, and put data points on a Google Map at the top of the page. These data points are represented by the logos of the various companies, so it’s easy to follow visually.

Those concerned about the privacy implications of this need not worry, Vicarious.ly doesn’t pull actual user names from the companies mentioned above. Instead, they simply note that “someone” checked-in at a venue. They do, however, give the venue name, which is a hyperlink. So if someone just checked into Stubb’s Bar-B-Q in Austin on Gowalla, you’ll see a link back to the Gowalla page for that venue. Likewise, if someone uploads a geotagged picture to Flickr, you’ll see a thumbnail of the picture in Vicarious.ly’s stream, and clicking on it will take you to that picture’s Flickr page.

It’s fairly amazing to see just how much activity there is even today, the day before the conference starts. Tomorrow and the weekend should be insane. “The amount of real-time, location-based information we’re indexing is staggering.  We wanted a powerful way to showcase that, so we built Vicarious.ly and targeted the launch to coincide with a massive gathering of geeks,” co-founder Matt Galligan says about the project.

You’ll note just how much of the activity are check-ins from either Foursquare or Gowalla. Those two are likely to be the two main competitors in the location war that will take place this weekend. (If you’re surprised not to see tweets in the stream, it’s a bug that SimpleGeo hopes to squash tonight).

For more on SimpleGeo, which has a powerful set of tools to easily provide geolocation infrastructure for other companies (such as the new hot startup, StickyBits), check out this and this.

While Loren Brichter may be hard at work on Tweetie Two for the Mac, he hasn’t given on his baby: Tweetie 2 for the iPhone. While the app hasn’t been updated since late November, a new build is due shortly with one big addition: native Foursquare support.

What this means is that anytime someone in your tweet stream sends out a tweet from Foursquare (which, to the annoyance of some users, happens automatically at times), that Foursquare link (shown as a 4sq.com URL) will be able to be opened in Tweetie in a way that displays the location information in a nice format. When a tweet is eligible for this feature, you’ll see a purple square logo in the upper right hand corner of the tweet in Tweetie.

When you click on a Foursquare link, you’ll be taken to a page that shows the venue’s address and phone number as well as the Foursquare mayor of the place. If you click on the address you’ll load a Google Map showing you exactly where it is. If you click on the phone number, you’ll be able to call the place right from the iPhone. Below all of that, there is a button to open the venue in Foursquare, which launches the Foursquare iPhone app.

A couple other new features in Tweetie 2 include Vodpod video uploads and the ability to attach messages along with your TwitPics to that service.

Look for this Tweetie 2 update soon in the App Store (it will be version 2.1.1). Meanwhile, Tweetie Two for Mac should be released in a private beta in about a month, according to new info shared on MacHeist today. Tweetie for Mac will soon be added to the nanoBundle 2, and in anticipation, they’ve added this message:

As a MacHeist customer, you’re not only receiving a free upgrade to the upcoming, highly anticipated Tweetie 2 – we’ve also arranged exclusive access to the pre-public beta for you guys!

Have fun using the best Mac Twitter client for now… and stay tuned for an email from us in about a month with your invite to the future of Mac tweeting.

Use of the location-based service Foursquare is on the up and up. But it’s use is mainly limited to mobile phones currently. That makes sense since the service is all about sending your location when on the go. But it would be nice sometimes to use it on your computer (beyond visiting the rudimentary mobile site from your browser). Enter FoursquareX.

This new application built by software developer Eric Butler is easily the best way I’ve ever seen to interact with Foursquare on a computer. Using Foursquare’s API, Butler has made a OS X client that not only allows you to see where your friends are, but even allows you to check-in at venues. And when paired with the notification application Growl, it’s a great way to get alerted about what’s happening on Foursquare without having to check your phone every few minutes.

The app is mainly meant to run in the background in your menu bar to serve you notifications (again, via Growl) when friends check-in places. But the more interesting part of the app may be its map component. If you open that up, you’ll get a window displaying a Google Map with all of your friends’ Foursquare icons overlaid on it to show where they are in the world. You can zoom in or out to show more detail of where they are. Or you can click on their names displayed in a timeline to the left of the map to bring up more details about their latest check-in.

There’s another view to this map too which gives you a visual representation of the Foursquare venues close to where you currently are. Clicking on any of them allows you to easily check-in. To the right of this map view there is a list of the venues currently trending on Foursquare (where multiple people are checking-in) as well as your “favorites” (the venues you check-in to the most).

There is also a setting for the app that lets you get notifications when other people check-in to the same venue you’re checked-in at, even if you don’t know them. Some people may not like that, but if you’re interested in meeting new people that you have at least one thing in common with (your use of Foursquare), it’s kind of an interesting way to do that.

Again, this app is currently Mac-only (and specifically, Snow Leopard-only), but if you’re addicted to Foursquare, it’s a must-have. Find it here.

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