I just recieved confirmation about NMAP scans bringing down AIX and SCO OpenServer.  I have experienced the AIX vulnerability while working at a customer site, but my coworkers have just confirmed that SCO OpenServer is also vulnerable.  Basically a simple NMAP tcp scan will reboot an AIX system and make SCO OpenServer hang.  FYI for anyone who uses AIX or SCO OpenServer.

Dusty

"Linux is for people who hate Windows. BSD is for 
people that love unix."