464696 Integrate 2 wordpress sites and a vbulletin forum

I currently have a busy forum running on vbulletin with almost 4000 members, it's very new. I am designing a new blog type front end for the forums using wordpress and need to integrate the login/user database and possibly custom fields as well. I also have a classifieds/personals site that uses wordpress and want that to share the same users and login as well. I need to be able to expand this to new wordpress sites as well. Basically a network or sites. Register for one, your profile/login/pass is active for all. The current vbulletin/wordpress bridge plugin is dead and I need a new secure solution. Is this possible? PLEASE DON'T BID UNLESS YOU ARE 100% CONFIDENT that you can complete this project effectively and efficiently. ***this is an adult related website, if this is a problem - please don't bid.