Last week I bought a T-Mobile G1, HTC hardware running Google's Android for a customer project. Its quite a phone with direct application to control embedded devices either through Wifi, cell GSM/3G or bluetooth (bt not ready for prime yet). I've also read two books.
Both books are excellent and complimentary to each other. Murphy has extremely simple and numerous android activity projects which clearly outline the many new facets behind Android application development. I'm not going to recommend one over the other, I recommend you buy both!