I'm developing a site and the original plan was to have a registration system for the main site that allows users to post reviews. I'm also going to be using vBulletin for the forum. This has me now thinking that I probably should just use the forum registration system for the main site. I don't want a portal and in fact I don't want the main site to have statistics from the forum on it (such as latests posts, etc). The only thing I want to integrate would be the registration system so tha the users can log in and use the main site. I may also integrate a number of users online (not a who's online, though). How hard would this be to do? Thanks.