Just in case you missed it Backtrack 5 r2 has been released with a ton of new tools including Reaver, Pyrit, and Pipal. The distribution also includes huge improvements to existing tools including Metasploit, Armitage, BeEF, and SET. The new distribution can be found on the Backtrack website.
If you are looking for a way to secure your linux server from some of the most common attacks being carried out today against linux servers then look no further then Rel1K’s Artillery program. Artillery is a combination of a honeypot, file monitoring and integrity, alerting, and brute force prevention tool.