The only problem that still bugs me is about "collaborators and authors"
Let me explain, when a collaborator submit some "news" post, the editor sees it, modifies it, and them, when he click "Post", the wordpress side works correctly, showing the collaborator name as the real author, but, in vbulletin side, it shows the editor's name.
Now, another thing. Those of you that want an easy way to login/logout from the Wordpress side, just use this plugin:
http://wordpress.org/extend/plugins/sidebar-login/ , works pretty well with vbridge.