I missed this news last week, nmap version 3.50 has been released, it is available for most Unix and Windows systems except SCO Unixware for which the GPL license has been violated and thus distribution of nmap under that platform has been withdrawn according to section 4 of the GPL license.

Full [URL=http://www.insecure.org/stf/Nmap-3.50-Release.html]press release[/URL], download [URL=http://www.insecure.org/nmap/nmap_download.html]now[/URL].