nmap 3.0 stable release has been.. uh.. released.
http://www.insecure.org/ quote:
Insecure.Org is pleased to announce the immediate, free availability of the Nmap Security Scanner version 3.00 from http://www.insecure.org/nmap/ .
Nmap is a utility for network exploration or security auditing. It supports ping scanning (determine which hosts are up), many port scanning techniques (determine what services the hosts are offering), and TCP/IP fingerprinting (remote host operating system identification). Nmap also offers flexible target and port specification, decoy/stealth scanning, sunRPC scanning, and more. Most UNIX and Windows platforms are supported in both GUI and command-line modes. Several popular handheld devices are also supported, including the Sharp Zaurus and the iPAQ.