Looks like a surprise iOS 7 jailbreak has been released by the evad3rs team. It's untethered, and according to their site, evasi0n, it's:
Compatible with all iPhone, iPod touch, iPad and iPad mini models running iOS 7.0 through 7.0.4
Jay Freeman (Saurik) seems to have been completely unaware of it, and has yet to update an official Cydia for it. If hot arrivals and potential incompatibilities aren't enough to dissuade you, however, it looks like you can indeed jailbreak your iOS 7 device as of today, and until Apple fixes whatever exploits it uses.
The question is, are you going to?
Update 2: evad3rs speak out about evasi0n iOS 7 jailbreak