Network card rootkit offers extra stealth

Yes you read the subject correctly.

This is really dangerous,

http://esec-lab.sogeti.com/dotclear/index.php?post/2010/11/21/Presentation-at-Hack.lu-:-Reversing-the-Broacom-NetExtreme-s-firmware

and reminded me of a quote I read a long time ago that the security guy has to do everything right but the hacker has to do one thing right :)