iPhone 5 on iOS 7.0.4, the jailbreak is working smoothly for me. Of course, the number of compatible tweaks is very limited this early in, but if you want to jailbreak now, you should go for it (make a backup first, of course).
Works like a charm on iPhone 4, iOS 7.0.4. Mostly jailbreaked to get iFile and Zod's emulators. Seems there have been some major breakthroughs in iPhone emulation.
iPhone 5 on iOS 7.0.4, the jailbreak is working smoothly for me. Of course, the number of compatible tweaks is very limited this early in, but if you want to jailbreak now, you should go for it (make a backup first, of course).
Thats what I've got! But I think you'd be surprised at all the tweaks working.