Issue 404 is the key to getting OpenID working on Google App Engine but currently it only has 10 stars. Please star Issue 404 to get OpenID support on Google App Engine. (Please add a star, _not_ a "me too" comment which will get emailed to everyone who has starred the issue and may cause other [...]

Update: Ryan just updated me that the issue we should be starring for this is Issue 404 not Issue 17. You can almost but not quite create an OpenID consumer on Google App Engine today using python-openid. Unfortunately, redirects to external OpenID providers are failing and Google currently does not think that this is a [...]