The iOS 6/6.1 jailbreak was just released by the Evad3rs team. We already knew it was coming this morning for the iPhone, iPad and iPod touch, and the group said we could expect it at about noon eastern. It looks like they met that promise, because you can now download the tetherless jailbreak tool. It’s called “evasi0n,” specifically, and can be applied through Linux, OS X or a Windows-based machine (XP or higher).
The site seems to be expecting some issues, likely due to demand, so you may need to wait a bit before you can download the tool.