I seriously doubt that...how do you patch bugs on a machine that has no hard drive?
For the little of Headhunter that I played yesterday, i like it and didn't come across any bugs. The enviroments are clean and "sterile" giving a strange mood to the game. So far I like what I played and look forward to putting in more time to it. Driving the motorcycle is pretty cool.
Shenmue 2...It's BIG. The enviroments I mean. I feel almost agoraphobic (sp?) while I played it its so big. It was VERY easy to get lost and there seems to be multiple paths to same location. (through alleysways etc.) It is also a much faster paced than the first one. With 2 game days under my belt I've been mugged, got two part-time jobs, fought some baddies, did a QTE chase sequence, gambled, and arm wresteled a couple of times. Theres a LOT to do in this version. So far it's great but not yet in the "meat" of the game yet.
As for the music, it seems fine. I thought it was great in the first one so I don't know what would make it better.