bbPress.org

To include the wordpress theme I simply included the header and footer files into the bbpress themes (deleting the rest of content in there) and then added the login to the header in the wordpress theme using <? if (function_exists(‘bb_login’)) ?>

You can see this at http://superturbodiesel.com/. The only problem I found was that you can’t login from the wp home page. In my case this is perfect as forum administrators are the only ones who can post in WP.