No social networking apparatus is complete without a few tweets. While there is a long list of apps in the Android Market that feature Twitter integration as a bonus, and a good handful of programs that are dedicated specifically to Twitter, one stands above the rest - Twidroid. It's got 4 stars in the Market, which isn't common. And considering that this one falls in the 10,000 to 50,000 downloads category, I'd say the star ratings are a good indicator of what to expect. That's not always the case.
With Twidroid, you can view the tweets of those you follow, post your own tweets, direct message, and reply. One of the coolest features is the ability to post photos. Well, kinda. Images are sent to phodroid.com and then linked in your tweet. Hint: attach the photo first, or the URL will over-write anything you've typed - same goes for the following paragraph.
There is some GPS functionality, but go to portrait mode too see all of your options on the non-scrolling menu (little bug there). They are: Insert Maplink, Insert Location Name, Insert Latitude/Longitude (seriously?), and Update Profile - for those who are just to lazy to type the full name of their city. Google Maps URLs are abbreviated via short.to, so none of the data should cramp your 140-character-limited micro-blogging style.
Twidroid's creators are called Zimmermann and Marban, which makes me think of an old-timey magic show. So I give it 5 stars.