Handmark's TweetCaster Twitter application is now live in the Android Market. (If you missed it, be sure to check out our review.) TweetCaster features support for multiple Twitter accounts, geolocation, searches and all of your other favorite Twitter features.
A free, advertising-based version is available, and there's a premium (ad-free) version of TweetCaster available for $4.99 in the Android Market. Note: You need to install the free version first, and then the upgrade key, to go ad-free. Download links below.