By now, Tweetie 2 has probably stormed your iPhone. If not, you should check it out; in our opinion, it's the best Twitter iPhone app out there (and yes, definitely worth the $3 [ iTunes link ]). But developer Loren Brichter isn't resting on his laurels. Instead, he's hard at work on Tweetie 2.1. So what's new? Well, there are a ton of small bug fixes, but also some pretty big additions. There are two that you'll probably care the most about: New-style rewtweets and geolocation support. We got an early alpha build of 2.1 to try out, and it's looking good.