Since the iphone already runs a skimmed down version of OS X I wonder if its possible to install the full 10.4 on the iphone. It would defiantly fit on the 8 gig iPhone, and with 128mb RAM and a 700mhz proccessor it would be able to handle it, albet slow but it should be possible. All the would be required is a custom bootloader for the iphone. It would make for an interesting project.