It wouldn't be totally inconceivable to try a Blu-ray disk in a fast G4 running the newest version of Mac OS X it can (or maybe Linux?) with a FUSE blob or something to enable support for the format, but I doubt the results would be satisfactory because even the fastest G4s are probably too slow for this sort of stuff (maybe a 2.0 GHz Dual G4, *maybe*). Late model Dual and Quad G5s could probably do it, however.

c