Not really important, but the vB.org homepage
isn't XHTML valid because a lot of missing &'s (and the missing XML namespace attribute in the html tag, like on all vBulletin pages). It could be fixed in 10 minutes, so why not?
Another small thing: the MOTM and BOTM logos are missing an alternative description. Empty alt attributes are a bit meaningless.
[high]* RS_Jelle loves W3C compliancy

[/high]