Huh, there're using Disqus for their comment system. Seems really odd that Google would go to a third-party for basic functionality. One would think they'd use the system from Blogger, Buzz, or somesuch.
No kidding, very first example gives: IndexError at /p/start and the full trace. (edit) actually, I get an array out of bounds on several if not all of the examples.
There currently is an issue with German GMail addresses (the ones that have to use @googlemail.com). So if you have trouble signing on, try using a different authentication method.
Do you mean that particular message, the fact that the editor takes a while to initialize or do you perhaps use the latest Chrome dev build and it's not loading at all?
