So i now have 15000+ people registered at http://openid.org
We are having some issues with a few sites but most are working great.
I put the source to the portal over at http://code.google.com/p/dotnetopenidprovider/
This is based on the excellent OpenID library at http://code.google.com/p/dotnetopenid/
I'll be updating the provider in the coming weeks, so please download, contribute and if you speak another lanugage, you can help out there too!