Did the site replace Cnet's in the tab/window, open in a pop-up, display as an advertisement within the Cnet pages, or open in a new window? (The link you provided just links to their website.) Could you have clicked on an advertisement? With the recent round of malicious ads I'm keeping my eyes open, just in case.
John
It disappeared once while I was trying to report it so the link may not hold together. It was on Cnet hard drive home page not the forums. Here are the vitals.
Pics of Girl Gamers
foxyfan.ugo.com
Pretty girls but the site may not suited to Cnet. Looks like someone is trying to sneak in but I caught them.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic