Why Google App Engine ? Managing everything yourself is hard DIY hosting for web application = Hidden costs and risks Wouldn’t it be nice if somebody else managed all the risks for you? What if there were a out-of-the-box solution? What if you could run your app on Google's huge infrastructure, alongside Gmail, GDocs? What if you get the services of Google’s CDN for “free”?
Scalable from day 0 President Obama's Google Moderator stats Why Google App Engine ?
What is Google App Engine ? Languages supported