One other 'thing' - there are some services that you have to enable billing before they are available on app engine. Google also typically gives you a 30 day/$X

One other 'thing' - there are some services that you have to enable billing before they are available on app engine. Google also typically gives you a 30 day/$XXX credit for it. That is a nice feature. The 'challenge' for me is that typically, at this point I'm still trying to test out my code and basically have no traffic so the $200 credit basically becomes a waste. It would be nice if one could be allowed to 'decide' when to use this credit. At my testing/experimenting/design phase, the free quota would be enough for me or I would be willing to pay out of pocket (since I'm still testing I would keep the amount to the barest minimum).