I have a Google App Engine app - http://mylovelyapp.appspot.com/ It has a page - mylovelypage
For the moment, the page just does self.response.out.write(\'OK\'
I'm not a python expert or a app engine expert. But did you try following the sample appl at http://code.google.com/appengine/docs/gettingstarted/usingusers.html. I created one at http://quizengine.appspot.com, it seemed to work fine with Google authentication and everything. Just a suggestion, but look in to the getting started guide. Take it easy if the suggestion sounds naive. :) Thanks.