I've been experimenting with GBase for the last couple of days. Google offers a really good API for Java and provided it is compatible with Android, I may be moving away from Amazon searches.
One benefit this gives me is the ability for users to backup their data to their Google Docs account. The Amazon searches is something that has been a great boon to my application but the more regions I support, the harder it is to use Amazon as my only search provider.
It looks like I may get to start doing some serious coding again :-)