The limitations are well known, just Google around. A relatively good overview can be found here: http://aralbalkan.com/1504 http://aralbalkan.com/1504 It was

The limitations are well known, just Google around. A relatively good overview can be found here: http://aralbalkan.com/1504 http://aralbalkan.com/1504 It was discussed in this thread: http://groups.google.com/group/google-appengine/browse_thread/thread/83a692fecb6c5b12 http://groups.google.com/group/google-appengine/browse_threa... It definitely depends on the kind of app you are doing. From my experience GAE is great for websites with high ratio of reads to writes. If you have a lot of writes or any non-trivial background processing, it becomes harder to develop for appengine.