We have bolstered security with additional spam blocking mechanisms in place from multiple databases that we are pulling from on the server level, and not the software level. With vBulletin 5 now in "Beta 18" we are looking at the feasibility of a possible upgrade.
The web server software has been upgraded to improve compatibility and performance with the latest version of PHP.
The forum team will hold an end-of-year official meeting on December 1st, 2012.