Well if everyone would kill for it, lets get together and pay someone for it...
There is a website called rpxnow.com that already has all login options and updates them for you whenever there is a change (myspace, facebook, twitter, google, yahoo, etc). This is just like facebook connect BUT it has all of the other logins available as well. Now all we need is to have someone create a plugin for it. A plugin for this already exists for Wordpress here
http://wordpress.org/extend/plugins/rpx/ . I have already installed it on my WP blog and it works great.
I also put in a request to rxp to have this plugin/mod created as you can make requests and they actually listen...you can vote for it too without registering here
https://rpx.uservoice.com/pages/8895-general . Look for the "make a vbulletin plugin" and vote.
Rpx has the same issue that the facebook connect mod is having in terms of not providing the email address but that is because Facebook does not allow it. As soon as facebook starts providing the email addresses (which I hear is soon as all other login options are providing it) Rpx will take care of updating it on their end without anyone who has this installed on their end having to do much.
What do you guys think???