The interesting part to Python Developers is that the runtime environment uses Python. All I can say, is way to go Guido!
If you want to see a real application using this cloud check out Huddle Chat.
At PyAtl the May meeting is dedicated to talking about Cloud Computing with Python, so if you are in the Atlanta area I hope you can make it. In addition, PyAtl, and some other people in the WSGI community are holding a WSGI Sprint this summer, where we are going to be developing with Cloud Computing and WSGI! If you are business in the Atlanta area and would like to get involved in sponsoring or contributing please contact me.