If you are looking to Jailbreak version 4.3.1 on your iphone and ipad than the wait is over. Thanks to the new version of Redsn0w 0.9.6rc9. It works for Windows and the Mac. Below are the links to download and also to the redsn0w hope page where there is even more information.
By the way, if you bought yourself one of those new shiny iPad2 than the jailbreak is not for you. Currently there is no jailbreak for the ipad2.
If you need to download the firmware for your device check the website below which will allow you to search for the firmware that goes with your device. If the website is down, then just do a google search, you will be able to find it easily.