user's profile page located at username.domain.com?
 

For example if my forum is montrealracing.com/forums I would like my user profile pages to be username.montrealracing.com automatically upon registration.

I know its possible but I'm just wondering how difficult of a hack this would be for apply to a VB forum and if anyone woudl be willing to attempt it?

Thanks

This is done by some rewrite rules. Try searching for mod_rewrite or .htaccess

Thanks for the reply. I don't know what you mean however.

anyone

You'll have to do some reasearch on wildcard subdomains i beleive, and mod_rewrite like Marco said.