iOS 6.1 finally released

iOS 6.1 is finally available for apple devices. This update contains improvements and bug fixes, including:
LTE support for more carriers (complete list of supported carriers at www.apple.com/iphone/LTE/)
Purchase movie tickets through Fandango with Siri, (USA only) iTunes Match subscribers can now download individual songs from iCloud and a New button to reset the Advertising Identifier.

As far as jail breaking:
iOS 6.1 can be jailbroken with Redsn0w 0.9.15b3 but only in tethered mode and only for older iDevices which have A4 chips or earlier. That means it'll work on devices like the iPhone 4, iPhone 3GS, and 4th-gen iPod Touch but not on the iPhone 5 or the latest iPads or Touches.