I received this message @ 10:38pm on October 30th. It smells fishy to me. I am forwarding a copy to valve as well. Watch your butts out there kids... and keep an eye out for one another as well, don't let your buddies get caught in a scam!
"NOREPLY@VAC.COM: Hello, this is an automated message from VAC. We have received an e-mail regarding your account. This users e-mail shall remain anonymous for security reasons. We have valid information leading us to believe this account may be stolen. This account will be temporarily disabled until we can gather more information about the true owner. Please visit this URL to confirm your steam account. If there are no infractions you will be rewarded with a free $20 value for the inconvenience. Please note, if you do not verify your account within 24 hours of this notice your account WILL be suspended. http://vacpowered.co.nr/
NOREPLY@VAC.COM is now Offline."

Screenshot - http://rosecitygamers.com/steamer.htm