I am at OSCON Java 2011 and just finished presenting about Android open source development tools covering the supplied default tools in the SDK and going way beyond covering libraries and tools for all sorts of aspects of Android application development. With just under 30 people in the audience I went through a whirlwind tour of Android IDE’s, development tools, suitable Java and Android libraries and a lot more.
The slides are available for download (smaller file) and should give you great resource to dig deeper since all links are right there and active. Following up on just a few of the ideas will hopefully make you a more productive Android developer and inspire you to participate and join open source Android activities.
Enjoy and let me know if they are useful for you
Update: Added a short version of the presentation that removes the slides for the transitions as requested by @shawnlauzon