yeh ther is jb for ios 6 its just tethered or was wen i last checked
yeh stil a tehtherd break,,, so basically IF your phone goes off runs out of charge or watever, you have to plug it up to pc with redsn0w to boot up,, simple clik of the mouse but thats how u must turn it on until untehthered coes out
http://www.iphonehacks.com/2012/11/how-to-jailbreak-ios-6-0-1.html
u wont know but wen new ios comes out u are better usin tiny umbrella to save your blobs, then u can downgrade from the new firmware to older ones for jailbreaking
NEEVER EVER EVER EVR EVER EVER EVER EVER EVER EVER EVER UPDATE YOUR HADNSETS