Folks who rely on carrier unlocks using Ultrasn0w will be happy to know that its developers have just released an updated version of it which supports the final release of iOS 5.
If you've been a regular reader of this site, you're probably aware of GEVEY SIM, a custom SIM card used to permanently unlock iPhones. We recently featured a tutorial on how to unlock iOS 5 Beta 1 using this method, yet Apple had reportedly made this method impossible in Beta 2. It turns out that an unlock is still possible using a slightly different method.