A remote-code exploit that could spread rapidly like the 2003 MSBlaster worm is putting all versions of Windows at risk.

I recommend that you immediately install a patch that Microsoft has just issued to protect your system from a vulnerability in the Server service.

MS08-067 (958644)
Rare out-of-cycle patch emphasizes the risk
With little warning, Microsoft released yesterday an unscheduled or “out-of-cycle” patch for a highly critical vulnerability that affects all versions of Windows. Security bulletin MS08-067 (patch 958644) was posted to warn of a remote-code attack that could spread wildly across the Internet.

Okay folks this is not a joke they threat is out there and if it is nasty enough for Microsoft to issue a patch then it is bad make sure that you download and install it. I know I had a couple of customers that got hit by it yesterday.
Baldy