I am still on 6 myself. I updated my wife's to check out 7 (she lost the jailbreak because she had to get her phone replaced last month due to a hardware problem (jailbreaking is supposed to void your warranty, but if you restore the phone, it erases the jailbreak files and they never know))
The only tweak left on my phone that I need jailbreak for is the 5 icon dock. I may update soon, but the iPhone Dev team have already had a jailbreak for iOS7 the question is if it will be something that they can release to the public or if it requires dev accounts.