I don't see why you want to implement blogs in UBB unless they're an import of Wordpress or Blogger blogs which are the market leaders.
Why re-invent the wheel?
I still can't believe that LDAP Authentication has not been implemented. Large organizations hate having separate databases of users which is a reason they choose not to buy UBB.
According to Rick from '07
https://www.ubbcentral.com/forums/ubbthreads.php/topics/182907/Rick.html#Post182907"At this time, we do not [support ldap]. It's something we've had on our todo list for quite some time, but always gets pushed back because the demand for it has been fairly minimal."
Now's an ideal time!
