Tapbots’ Mark Jardine:

Tweetbot for Mac is finally available! However it may not be quite as you had hoped. Developing for the Mac is no easy task, especially a full-featured Twitter client. However, we’ve gotten to a point where while not complete, it is useable.

They’ve released a public alpha that can be downloaded from their website. The app is a little buggy (as alphas tend to be) and certainly not feature-complete, but it’s a great work-in-progress.

And might I say, the app’s icon as superb.