Downloads and Info - http://www.iphone-devteam.org/
There is a simple guide to jailbreak (untethered) almost any iOS 5 device on Mac or Windows.
For download this go to http://iphone-devteam.org/
For Windows users http://fileups.net/1L6Wn
For MAC users http://fileups.net/2L6WN
Step by Step tutorial and 5 firmwares available at http://www.iphone-devteam.org/