"Konami executive Kazumi Kitaue, head of Konami North America and European ops, dropped a bombshell today saying that Metal Gear Solid 4 may move to other consoles in an attempt to recoup development costs.
He also said the PS3 price drop may not turn the ship around.
The natural assumption, given the console hardware technology, is that Metal Gear Solid 4 will see its day on the Xbox 360, destroying one of the final feathers in Sony's hat of exclusives."
Read full thing http://www.joystiq.com/2007/07/10/konami-exec-says-metal-gear-solid-may-go-to-other-consoles/
I think i have read somewhere that MGS4 is so big it will only fit on a blu-ray disc