> How do I find out what my google
> account openid is?

Click the google picture at the login page and you'll automatically be redirected to the right place.

> Sorry, I know this should be posted in meta but I can't post there without logging in...

You don't need to login to read other posts, and there are lots of questions that already cover this [topic][1].


  [1]: http://meta.stackexchange.com/questions/tagged/openid