Some retarded SEO companies enjoy spamming wikis like ours with links to their sites. This is pointless, as all wiki links are rel=nofollow, but you can't stop stupid.
A few of us patrol every change on the wiki, weeding out spam and deleting spammers, and it would be greatly appreciated if anyone felt like joining in. I've seen a few helpful people noticing spam lately, but the first instinct is to replace the pages with different text, which is wasted effort. A wiki is an odd beast, so I've put instructions on how to properly block spam on the wiki.
Another thing that would be awesome is if people could periodically have a look around the wiki for pages that are out of date, or not linked from where you'd expect. You could also put interesting updates in the News page - it'd be nice to start that back up again.