Thanks, might need it. :) I've got a couple others on standby, but I really hope the big G is cool about this.
Isn't it cool enough that they make it reasonably easy for you to build an interesting service off of their technology? Why are they obligated to also lend you their reputation just because you believe you have their best interests at heart? What if there's a security hole in your service that causes a PR disaster for them?
Google gets plenty of positive attention when you follow their rules about crediting their API and data. It is not necessary to use their name in order to pay tribute.
That said, I hope everyone involved just relaxes and lets it grow! Good luck!