MySpace Joins OpenID Coalition
top of it, I haven't had any luck on getting these providers setup as authenticators for anything other than their own domains. I.E. I can be JimBob at Yahoo.com, and JimBob at Blogger.com, and JimBob at Facebook.com, but I can't set any of them up to authenticate me as "JimBob" of "random URL". Which completely destroys any utility of their membership in this group.
Of course you can. As long as you control "random URL", you can add OpenID delegation code in your source. Then you can use your random URL as your ID, but still use Facebloggerhoo as backend authentication.