If that is the case, couldn't they have made UMD in the same form factor, or at least so it could accept Hi-MD discs? I understand that UMD works best for games but the PSP could have been a bonus Hi-MD player. I need the 1GB Memory Stick for movies mostly. A full-size movie at optimal MPEG4 quality would take around 700MB of space. Of course, the PSP will also play back MP3s (& ATRAC hopefully)