Any and all activity on the jailbreak front these days is courtesy of a Chinese team known as Pangu. It emerged on the scene not too long ago and has been pretty active in providing an iOS 8.0.x and iOS 8.1 jailbreak for all supported devices. The first version of this jailbreak was meant for developers and it didn’t include Cydia but Pangu has now come out with an updated version of the tool which brings Cydia as well.
For those who don’t know Cydia is basically the alternative App Store that jailbroken iOS devices can access. It provides applications, themes, wallpapers and tweaks which are otherwise not allowed on a stock iOS device.
The updated Pangu tool brings untethered jailbreak for all iOS 8.0-8.1 devices and it also fixes an issue on some iOS devices that would cause them to heat up. The devices include iPod touch 5G, iPhone 4S and iPhone 5, iPad 2, 3 and 4 as well as the first generation iPad mini.
Those who jailbreak their device should keep in mind that it does void the warranty, but its easy to reverse a jailbreak, doing a clean software install on your device will remove all traces of it ever having been jailbroken.
Only one caveat exists with Pangu, its only available for Windows at this point in time.