NMAP 4.00 is here
Not much more to say about it. If you use it, you are probably as excited as I am. If you don't... then go download it. It's a valuable tool that should be in any security engineers arsenal.
Related links:
Documentation: http://www.insecure.org/nmap/docs.html
Download: http://www.insecure.org/nmap/download.html
Release Announcement:
http://www.insecure.org/stf/Nmap-4.00-Release.html

