I'm disappointed by the way WP assigns Open ID names.
One might have various blogs; (s)he is the same human, and should be carrying the same Open ID. So, it is straight forward and natural to have his username as an Open ID name, or even better her/his display name, as chosen in WP her /his profile. Just like a gravatar is connected to a human, not to a blog, and just like when you comment in a WP blog, you are a human, with your display name, not a blog...
I think WP has got this wrong and it should be changed as soon as possible.
Right now, I am posting as Stazybο Hοrn, as a human blogger, not as one of my blogs...