Right now I have an iPhone 4 with iOS 4.3.3. I am jailbroken, over-clocked so it's blazing fast, & have some good apps not available in the app store like text notifier, and most notably Grooveshark. While I know 5.1.1 can be untethered jailbroken, my iPhone is running really smooth, and is simply working flawlessly - fast, reliable, efficient, and useful. The only feature I would get if I did upgrade to iOS 5.1.1 is Siri0us from Cydia, which will let me voice to text. Thoughts?