Hi. An idea for Apple to open iOS more, kill jb and related vuln. research: release an alternate firmware version not requiring signed code. Advanced / power users would have to download this special version and install it with their own risks.
Best of both worlds. People that want to do adv things with their iPhone would use the special fw version, others would stay with the orig. And yes, the best argument is: they already allow unsigned apps on OS X. iOS is no different. AppStore exist on both.
What do you think? Would this be a good compromise from Apple? Would it replace your jailbreak?