Android gets its own official Twitter app on Android Market
Among the features of the "official" Twitter for Android app is full support for widgets, using the Quick Contact bar to see user's tweets and the ability to upload images and videos straight from the Gallery. The home screen widget lets you access your timeline and you can view the location of a tweet on a map. Twitter for Android is a free download and can be scanned into your phone via the QR code on the source link. Or, as we mentioned, you can roll your shopping cart in the Android Market over to the application and install it on your Motorola DROID, Nexus One or HTC Droid Incredible. If your Android phone is not of those three models, you will still have to use other apps like Twidroid until your handset gets upgraded to the newer build.
Motorola DROID Specifications | Review
HTC Nexus One Specifications | Review
HTC Droid Incredible Specifications | Review