BackTrack 4 (Final) is officially released.
If you didn't already know, "BackTrack is a Linux-based penetration testing arsenal that aids security professionals in the ability to perform assessments in a purely native environment dedicated to hacking."
This release includes a new kernel, a larger than life toolset repository, custom tools a plenty, and more importantly, fixes for all those annoying bugs in the pre-release.
You can download it at http://www.backtrack-linux.org/downloads/
However, the site has been getting hit pretty hard this week so I suggest you grab the torrent at http://www.backtrack-linux.org/bt4-final.iso.torrent
Read more here.