vBulletin appears to be better than any other BB types. I have got experience with it, MyBB, PhpBB, SMF... nothing is better than vBulletin.
It's with great pleasure that I introduce ... WHMCSModule Whilst the site still has a bit of work the module is ready in Beta form
There is nothing on your site what so ever in regards to a forum module for WHMCS.
Like I said the site still has a lot of work still but the module is in a beta form. The completion of the site doesn't effect the module from being released.