I said it before, Google MUST work closer with the likes of Facebook, Ebay, PayPal, etc, to make killer applications that are going to drive the take-up of Android. If the general public has to choose between Android, iPhone, Blackberry, etc, then they will talk to people and at the moment the general view will be that Android apps for things like Facebook are poor compared to iPhone.
I *know* that Android is newer, etc, but Google have more money than the whole of the UK at the moment so throwing some at a couple of teams of devs/consultants to work with the "big boys" would pay off for them.
I also know that Google simply don't seem to care and would rather spend their time developing animated wallpapers and Goggles (that is simply quite pointless).