Signed up for Google's AppEngine

So I’ve finally taken the plunge and signed up for one of the cloud computing services. The main reason why I chose Google’s was because it offered a free trial to see how my applications would integrate. I know Amazon’s is really cheap, but you don’t have any money coming in yet there is still a difference between really cheap and free.
Only problem is that I’m waitlisted, well that gives me some time to look it over and model things out before I dive in completely.