i have downloaded the distro from over at :
http://www.backtrack-linux.org/backtrack/backtrack-5-release/
and have been using it for the last couple of days its amazing it has a huge repetoir of tools ranging from information gathering (nmap etc) all the way through to forensic tools (truecrypt etc…). my compliments to the rapid7 team for the gui for wa3f probably one of the best web audit gui that i have found….
another nice include is gerix wifi cracker for all you wardrivers out there.
all of this in just one distro and more. i highly recommend this for any veteran security professional or amateurs alike.