I'm surprised they didn't lift the quotas for printwhatyoulike, given they advertised it on the App Engine blog. Still, the "preview" status of App Engine is well known. If you don't want to worry about quotas, either wait until they allow payment, get them to significantly up your quota before you go public, or deploy on another system for now.

Aargh. I thought the over quota issues had been fixed :-( GAE is a great service, and it makes deploying and hosting an application dead simple, but how it actually works is a big mystery. GAE doesn't give any indication that your application is at or near the limit of a quota. Even now, while PrintWhatYouLike is giving over quota errors, the GAE dashboard for PrintWhatYouLike says that everything is a-ok. DocSavage, I wish I would have taken your advice a few weeks ago:)