It's a couple days later than we thought, but worth the wait; if you're running iOS 4.1, the GreenPois0n tool has been set loose for your jailbreaking pleasure. It's a Windows-only release for now—something they're hoping to correct "soon"—and supports iPad, iPhone 4, iPhone 3GS, and the third and fourth-gen iPod Touch. Upcoming releases should support second-gen Apple TV. Go ahead and set your device free here: [Chronic Dev]