Tethras (http://tethras.com http://tethras.com) is built entirely on top of App Engine for Python. We're a fully managed app translation service. We've found a

Tethras (http://tethras.com http://tethras.com) is built entirely on top of App Engine for Python. We're a fully managed app translation service. We've found a lot of the baked in features like map reduce and the search api really help us with out with our translation memory and translation search implementations.