We mentioned last week about MetroTwit, the desktop Twitter client who's UI was influenced by Windows Phone 7. At the time, the software was still too early in development to be released, but alas its creators have allowed the beta our the gate.
First thing you should know is it'll require you to install .NET Framework 4 Client Profile and Extended, which it will do on its own if you allow it. That's a whopping 89MB for that entire framework, so be prepared. Then you'll have to restart your computer and the final install of MetroTwit will take place. The actual MetroTwit program is very tiny at less than 3MB, owing to its .NET coding.
Overall, it's quite a pretty program. With its configurable columns, its very much like Seesmic. You can add/remove those columns (your feed, replies, friends, direct messages) and drag and drop to re-arrange them.
Technically it can do multiple accounts, but we had trouble getting it to do so. Especially noteworthy is the live "badge" on the icon in the Windows Start bar which displays how many new Tweets you have. Other advanced features like delete, map, conversation, show in browsers are missing as of this early build, but we imagine it's just a matter of time.
Remember, this is a beta, so there are some bugs and some of the menu/options are less than intuitive, but overall it's not too bad for such an early start.
Get it here: http://www.metrotwit.com/