There are plenty of Twitter apps for Android, but in our opinion Seesmic is one of the best. The team behind it may just have made it even better, however, with Seesmic for Android v1.3: the update adds geotagging and extra retweeting functionality, as well as satisfying one of the most commonly requested features, a homescreen widget.
The widget allows you to scroll through new tweets in your timeline together with composing a new update of your own directly from the desktop. Meanwhile the new retweet functionality allows you to choose between traditional quote method, or Twitter's newer retweet system.
Finally, geotagging can automatically or manually add location data to newly posted updates. Seesmic for Android v1.3 is available - free - from the Android Market.