I have read that the iPhone SDK (part of Xcode 3) is restricted to Mac\'s with the intel chipset. Does this restriction apply to only the simulator part of the SDK or the co
If you actually want to run your binary on the device, not just the simulator, you need the advice from the following page:
http://discussions.apple.com/thread.jspa?messageID=7958611
It involves a Perl script that does a bit of 'magic' to get the code signing to work on PowerPC. Also you need to install Developer Disk Image from the SDK packages. When all is said and done you can use a G4 to develop on the real device and even the debugger works. But I think Instruments doesn't work.