Limera1n

Limera1n is live! According to the devs, it will jailbreak all idevices and is fairly easy to use. It is unpatchable and untethered. Of course, today's release of Limera1n means that the release of Greenpois0n is delayed, but it is well worth it. And to clarify one thing, Limera1n is for iPhone 3GS, iPod Touch 3G, iPad, iPhone 4, iPod Touch 4G, 4.0-4.1 and beyond. You can go HERE to download it and free your idevice. This was done by Geohot so you know it will be good. Please keep in mind that it is in Beta and that means that it is a great idea to read into it a little before you go jailbreaking.