In February I switched from working on my company's iPhone app to our Android app. While I was working on the iPhone app I often found new ideas, inspiration, and fascinating explanations at excellent blogs such as http://www.cimgf.com/ http://cocoawithlove.com/ and http://www.mikeash.com/pyblog/. Since switching to Android, I've found only one blog I consider of equal usefulness as the last three, and it's only a few weeks old: http://mindtherobot.com/blog/
There are a number of other blogs floating around, notably the official Android Dev blog which has only recently started making meaty posts, and Romain Guy's blog, which unfortunately is largely outdated.
Where do you go for new techniques and perspectives on Android development?