I have an OS X machine. Otherwise I would jailbreak the device for developing and buy a Mac Mini or something if it turns out I need OS X to do codesigning when

I have an OS X machine. Otherwise I would jailbreak the device for developing and buy a Mac Mini or something if it turns out I need OS X to do codesigning when I submit it. If anyone develops for iPhone without Xcode I'd love to hear it. I'd switch in a second if something could provide even half the functionality as long as it had half the usability issues.