It is an interesting conundrum right now. I am considering investing in using Ruby/Rails DUE TO Heroku. If djangy was ready and of comparable quality it would be an easy choice for me (I am comfortable in python, completely new to Ruby/Rails). But having to compare Heroku vs GAE vs Python-Stack is much more complex. I am not a fan of the limits in GAE, but I don't want to deal with system administration at this point. But I want to use python. Arg.