Apple has pushed iOS 8.1.1 which patches Pangu's signing evasion exploits and thus patching the 8.1 jailbreak for 8.1.1! Both iOS 8.1 and 8.1.1 are being signed at the moment but they will stop signing 8.1 in the near future. If you are at all interested in jailbreaking your iDevice it is recommended that you update to 8.1 as there probably won't be another jailbreak out until 8.2 or 8.3.

To check to see which iOS version Apple is still signing check this website: https://ipsw.me/all

Link to 8.0-8.1 Pangu jailbreak: http://en.pangu.io/