iCloud Keychain was removed from iOS 7 GM and looks to be added back via an update when OS X Mavericks is released. It makes sense that Apple would also include a security patch for a jailbreak if it's released soon. I'd rather the Jailbreak developers wait for the next feature update (7.0.x or 7.1) so that we don't miss out something big like iCloud Keychain. But I can see that turning into a never-ending game.