I would also like to see some additional music in the game. I had a musician character quite a while back, but I didn't develop it like I should have. One thing I discovered as I was searching for instruments is that *anyone* can create music in the game, you just have to work on some descriptions beforehand.
As far as genres and ideas for descriptions of music goes, here are some random thoughts (as a musician and futurist):
1. Physiological Effects - The US Military is already researching Sonic weapons (and they used Van Halen as a sonic weapon at WACO), and I think the emerging sonic technologies will be used for heavy effect in music - such as Ter'r above (making people truly fearful). Other physiological effects could include massive sub-sonic tones that you can't hear, but you "feel", tones that affect mood (euphoria, despair, etc.), even tones that are engineered to excite particular molecules in the body to produce brief spurts of strength/agility/etc. I think it could be arguable to have a musician, with the right instrument and a high enough skill (artistry or a tech skill?) to temporarily affect the stats of the listeners in a given room. But I'm not coding it so it's easy for me to say :)
2. Revolution/Protest Music - There will always be protest music, and I think Withmore is ripe for an undercurrent of protest music of some sort. It doesn't have to be tech-based...and probably shouldn't be, since the revolutionaries would be dirt poor. This could also mean music made from junk found on the street - something any character could create and participate in. It could be tied into the gang culture as well - an Arteries chant, perhaps?
3. Multimedia - Although really an early 21st century form, I think Multimedia music presentations (encorporating music as well as stage shows involving computer generated visuals, performance art, etc.) will probably have a lasting effect on the music world. I could definitely see intricate holo-shows in small clubs on Gold or Green. On red, this could involve all kinds of audience involvement - I think making the audience chant would be cool, especially if there were a lot on players online there.
4. Genres - This is tough, but let's try to go beyond combining existing genres - what is something new and unheard of? What genres do we have, and where do they come from - rock, country, jazz, blues, rap, classical, not to mention types of world music - Japanese Gagaku, Indonesian Gamelan, Indian Ragas, etc...many of these have a very long history, and some are relatively recent. I think one of the biggest forces in music today is globalization - world musics influencing Western music (think the Beatles) and Western music influencing other musical cultures (hip-hop and dance music in some form is almost ubiquitous worldwide now - think Bollywood). When we think of combining genres, we should also think of these forms of music. If you have never heard any Gagaku, you should check it out. It is a form of orchestral music that predates all Western classical music (ca. 700 AD), and is very slow, atmospheric, and somber. I could totally see it meshing with some real dark western music to be a force in the Dome (Gagothku?)
These are things I think about all the time, so I am sure I will have more to say later.
<shameless_plug>Although not typically cyberpunk, I do compose music that is..shall we say...bizarre? If you are looking for something new to listen to, it's all available for free download at nathanbibb.com</shameless_plug>