There is a new sasser.F out. :) Get on the ball. :)

Here is some info I found on Nod heuristics.

NEW GENERATION' ANTIVIRUS SOFTWARE BLOCKS MOST VIRUSES, WITHOUT UPDATES
Netsky, Bagle, MyDoom, Hiton, Sobig, Nimda, Swen etc. no threat to NOD32 users
March 7, 2004
NOD32's new 'next generation' antivirus software has detected > 80% of all new in-the-wild viruses in the last six months without needing specific signature updates, and without 'false-alarms'.

In this era of fast infecting, mass-emailing viruses, any delay in providing protection can have a huge impact on virus spread. NOD32's performance in stopping most viruses without any need for a signature update is highly significant.

'While most antivirus makers were scrambling to create signature updates NOD32 users were already protected even before anyone knew what these infections were.' commented Kirk Parker, NOD32 Corporate's Technical Manager.

'Many antivirus products use a combination of signature and heuristic detection methods, but few give much attention to the heuristic side,' commented Richard Marko, NOD32's head of Strategic Development.

NOD32 antivirus is the exception, with new, world-leading technology in both signature and heuristic detection. NOD32 was able to block these latest infected messages using its 'Advanced Heuristics', detecting more than 80% of new 'in-the-wild' viruses without a signature update. Viruses pre-detected by NOD32's heuristics include LoveLetter, Marburg,
Badtrans, Swen, Bugbear, Sobig, Kournikova, Lovsan, Lablan, Mapson, Sobig Mimail, Klez, Sircam, Nimda, Bagle and Netsky. Signature updates are released as often as needed.

NOD32 has been awarded more VB100% awards (by Virus Bulletin Magazine UK) than any other antivirus product, and actually has not missed a single 'in-the-wild' virus in over 5 years of testing by Virus Bulletin Magazine.

http://www.newsmedianews.com/software.htm#nod32