Video: Official Twitter app for WP7
Not much to say other than it looks smooth, it looks good and we're glad Twitter is officially on board. Actually, it is kind of neat that you evidently don't need an account with Twitter to use the app, you can just browse around if you want. Good for you social-network-phobics out there!
Update: David K. over at MobilityDigest correctly notes this one big downer mentioned in the article (which we'll summarize soon) is: "The result, combined with the lack of copy or paste, is that the Twitter app for Windows Phone 7, while unique and pretty, won’t allow for important basics like being able to tweet a photo from one’s library or even send a link from the Web browser."