So, I just recently found Matriux which is, yet another, penetration testing distribution of Linux (Ubuntu to be exact). I've messed with it a little and I've got to say, I actually like it better then BackTrack 4.
Looks alot more trimmed down in so far as the tools it has in comparison to bt4. There's a few things I either didn't see or they've missed out... SET being one and MITM type tools such as Ettercap. Somehow SET wasn't included but fasttrack was :S interesting