From wcradio's main page:
Quote Originally Posted by wcradio.com
WCRadio hacked? Hosting Malware?
Wednesday, July 9th 2008 by TotalBiscuit
As many of you will have noticed, specifically those using Firefox 3 or getting here via Google, WoW Radio has been flagged as an 'attack' site. Basically what happened was, a hacker attempted to insert malicious code into our forums sometime last week. He was quickly headed off and as far as we know, nobody was infected. However, in a stroke of fabulous bad luck, Google was scanning our site at the time for malware, as they do every now and again, and flagged us. We can assure you that there are NO trojans or malicious software on our site at all, and we have already submitting a petition to Google for removal from their blacklist. Until that is approved, we ask for your patience. The attack message can be bypassed by using another browser or previous version of Firefox. Please let your friends know what has happened, and thanks for your patience and understanding in this matter.

If you wish to turn this warning off, you can go to your Firefox 3 settings under Tools > Options > Security and turn off 'tell me if the site I'm visiting is a suspected attack site'