Windows Live OneCare is finally out...
Nice to see that OnCare has made it out into the wild. I was on the beta for OneCare and found it to be very usable. I've used Norton AV and McAfee virus scanners in the past. I really have not liked the 3rd party antivirus apps because they eat up alot of resources and cause compatibility issues. OneCare seemed to play nice and I didnt notice any system degradation while using it. If your still riding bare back I highly suggest you try out OneCare.
P.S. another really nice light weight virus scanner is portable clamwin. It's free and can run from your usb thumb drive. Good for those times when you have to play IT guy for your family or friends. :)