Elsewhere in the web - Smashing Magazine "Designing for Android"

Smashing Magazine is running a great article by Dan McKenzie (@danielmckenzie) about Designing for Android. The article gives a good overview to Android screen sizes, screen densities, design patterns and more.

For designers, Android is the elephant in the room when it comes to app design. As much as designers would like to think it’s an iOS world in which all anyones cares about are iPhones, iPads and the App Store, nobody can ignore that Android currently has the majority of smartphone market share and that it is being used on everything from tablets to e-readers. In short, the Google Android platform is quickly becoming ubiquitous, and brands are starting to notice.

It's definitely worth taking the time to read it:
http://coding.smashingmagazine.com/2011/06/30/designing-for-android/