You can click on the Google or Yahoo buttons to sign-in with these identity providers,
or you just type your identity uri and click on the little login button.
We're still busy with the CubicWeb 3.0 releases. We did two releases of cubicweb last week : 3.0.2 and 3.0.3.
These were mainly for bugfixes, particularly about how the multisource functionality was working.