Re do an app i can shown made in php and ExtJs, and the same in JSP.
First one was too slow, i will show both.
i think i had choose bad the language developed.
I need to be super fast, good looking app, and extreamlly functional.
I have been developing very actively on App Engine and am very familiar with the platform. The object-model based database is quite different from mysql but it's quite amazing once you know how to take advantage of it. Choose me and I can you show you the benefits of App Engine.