BackTrack 4 R2 had been out for a week. I heard good news and great review of it. For those who do not know what BackTrack is, basically its THE distro to load when you are doing hacking, penetration test etc using Linux tools such as Metasploit etc.
Its 2GB in size for both favors of ISO or VMWare. VMWare had some shortcoming in Wifi testing obviously...