I still don't even have my G1 in my hands, but already I can tell that it is going to be a huge success.

• Besides Google's official marketplace I know of two alternative marketplaces already, both looking sweet.
• There are also a bevy of news sites, blogs, and forums - AndroidGuys AndDev HelloAndroid Phandroid AndroidForums
• Not to mention the mailing lists all thriving. It's tough to keep up with it all.
• And then there's people like this guy making things they think are just awesome

As for me, I'm working on a couple (free) app ideas of my own that I hope to have out in the couple weeks following the election, and I hope to make Android app development a significant part of my income stream in my post-election world. The market for it is there, and I'm convinced it's here to stay,