@ nbarnes
Even assuming we could get past all the legal issues and actually get a port onto the PS3, who do you think would buy it? I doubt sales would be anywhere near as good as you'd hope.
The PS3's target market is teenage males who play games. Most of them probably haven't even heard of Linux or are even aware that it can be installed onto the machine. They bought their games console to play games, not revolutionize their desktop computing experience. And if the games work, why bother using AmigaOS as another layer between software and hardware? We all know from the classic days that you can get more power from banging the hardware than running through the OS.
Computer-like expandability for consoles has consistently failed. Direct-connect modems for the Gensis/Megadrive and SNES dropped off the market in less than 2 years. A full internet suite for the Sega Saturn failed to gain any momentum in the US and Japan, and was never even launched in Europe. In Japan, printers and floppy disk drives were available for the machine to allow the user to run a word processor, but has managed to hide under the radar. NetBSD ports to the Dreamcast never gained much popularity either.
AmigaOS is a unique system that needs its own hardware (whatever the hell that is) - piggybacking it on top of an established product is not going to help much. If you want to OEM PS3 boards in a computer case, there might be a better chance, but trying to appeal to the existing PS3 base is probably a futile effort.
And besides, in true Amiga curse fashion, the PS3 is selling rather abysmally (compared to predictions) in all territories. You know what'll happen - AmigaOS will be announced and ported, followed by Sony dissolving their games division. ;-)