I just received my “new” Lenovo ThinkPad T61, I bought it as a work machine, Its rock solid and ready to go. of course as with all computers I’ve been buying as of late it has packet injection support built right in 
Usually I’m not a fan of Backtrack 5, however I’ve been using BT5-Gnome and well I’m a big Ubuntu 10.04 fan which is exactly of BT5-Gnome is based on. This thing has a fingerprint scanner, thanks to the think-finger software I can use it in the terminal and it is dual booted with windows 7. First thing I did was add my personal repo, install guake, openssh, and tightvnc server… and of course firesheep and downgraded my firefox to a usable edition. Now I just have to add my automation scripts and I’ll be all set I highly recommend the Thinkpad T61 for anyone whos looking for a mid-sized laptop (14.1″) but stills wants a solid machine with packet injection built-in. This machine is spill/drop resistant and cost only $200 with 2gb ram, 100gb hdd, 9 cell battery, and a 2ghz processor. Not a bad deal m8s.