With all the crazy twitter stuff we've been adding. You can now tweet, XBA threads... Here's how..(the official instructions)

This modification adds basic Twitter integration to vBulletin. Once a user defines their Twitter username & password within their vB Options (User CP -> Edit Options), the Tweet This X links will appear.

It automatically adds a tweet to their account with the default text of "Check out this XBA forum thread". These redirect to the thread / post that was tweeted.
The tweet link (once added) is under thread tools.