It's not surprising that the Python powered Google AppEngine will be a natural fit for Jaiku - AppEngine is designed to easily sale for internet applications, and it's clear that Jaiku needs that extra scale. And of course the original Jaiku was programmed in Twisted, a network framework around Python.
Jaiku will be fully deployed on the Google App Engine in the near future. Andy & co. are working hard to ensure the port is a success and we will make a further announcement once the port has been completed.