I suspect that there is a unstable jailbreak now, I mean, what can those asians not do?
I'd expect a JB release in maybe 2 weeks. Check out
gdeluxe.com, they've said that they have found exploits in iOS 7 already, which will boost the development.
Tethered releases usually come first, but it takes much more time for an untethered release (obviously), so expect a tethered jb soon.