I just want to give you an idea,
if the authentication module can be adapted to an already working web application UseBB can be more popular, using the authentication already implemented.
Think on this scenario:
Somebody already have a web application where the people puts requests, or tickets, calendar events, etc... but they now want to have a BB, so the administrator downloads UseBB, adapts the authentication and session's PHPs.
You can have a auth.php where you receive the name of the table, the name of the field with the password and username and it returns your $userlevel
Just an idea....

