Is there a definitive yes/no about Mac OS X Snow leopard needing an AV?

I see there are some out there (AV for mac), but from what I read in the documentation they kind of get around to saying it's not really needed. (Apple).

Real world opinions? I picked up a Macbook for 799 after 200 MIR from Microcenter and hope to put Win 7 on it along with OSX Snow leopard.

Just curious as I know there must be a few Mac users here.

 

http://antivirus.about.com/b/2009/09/01/apples-snow-leopard-antivirus.htm

 

That certainly sheds some light on the question - thanks!

 

I have clamavx installed on my mac just to scan suff that I transfer to my PC. It doesn't have a real-time scanner.

http://www.clamxav.com/