OpenID consumer for JAVA GAE

Question

Is there any OpenID implementation I could use in my GAE (Google App Engine) Project?

Answer 1

I think it is now supported by GAE sdk http://code.google.com/intl/nl-NL/appengine/articles/openid.html

Answer 2

One option is to use RPX which allows your application to accept OpenID from multiple sources without you having to do the hard work.

I have used it for my GAE app, even jusing GWT and it works well.

rpxnow.com