Well i still haven't found such a site for music, but i have found one for old PC games!!
Good Old Games just went into Beta, and i managed to sneak in just under the wire :)
It's actually even more awesome than that though. They're not just reselling old PC games, they've actually got a team of programmers rewriting them to work on XP/Vista without having to use DosBox! They're doing some kind of emulation to get them to work i think, but it's not a seperate program you need to worry about. (I've never been able to get DosBox to work effectively for me without lots of lag, and usually without sound.) In addition, along with the game you also get lots of little extras for most games. The manual, mp3s of the soundtrack, artwork and wallpaper, etc.
_And_ (so far at least) all the games are only $5.99 or $9.99 :)
At the moment they've only signed up Interplay and Codemasters to contribute games, but they're hoping if initial sales are good they can get more publishers to join. They've already got quite a few good games though. I've already spent $18 picking up Fallout, Fallout 2, and Fallout Tactics.
The open sign-up for the beta is closed now, but i've got one activation code i can hand out if anyone is particularly interested. First come, or shelleycat or 2gouda4u or thegreatgonz, first served i suppose :) (And actually, if there are several people really interested i think i could finagle an extra code or two.)
So here's the games they've got so far:
Interplay: Conquest of the New World, Descent + Descent 2, Descent 3 + Expansion, Die By the Sword + Expansion, Earthworm Jim 3D, Evolva, F/A-18E Super Hornet, Fallout, Fallout 2, Fallout Tactics, Freespace + Expansion, Freespace 2, Giants: Citizen Kabuto, Hostile Waters: Antaeus Rising, Invictius: In the Shadow of Olympus, Jagged Alliance 2: Unfinished Business, Kingdom: The Far Reaches, Kingpin: Life of Crime, Lionheart: Legacy of the Crusader, MAX + MAX 2, MDK, MDK 2, Messiah, Original War, Redneck Rampage Collection, Sacrifice, Shattered Steel, Shogo: Mobile Armor Division, and Stonekeep.
Codemasters: 1nsane, Colin McRae Rally 2005, IGI 2: Covert Strike, Operation Flashpoint GOTY Ed., Perimeter, Soldiers: Heroes of World War 2, and Toca Race Driver 3.
Currently all the Interplay games are $5.99 and all the Codemasters games are $9.99, which doesn't make much sense to me. Interplay has almost five times as many games for almost half the price, and a lot of them are games i've actually heard of before and am interested in, unlike the Codemasters ones =P
Of course eventually i'm hoping they'll get things like Master of Orions 1&2, Master of Magic, X-Com, Civs 1&2, Call to Powers 1&2, X-Wing & TIE Fighter, etc. And while we're at it, if they can cut a deal with whoever owns the SSI licenses now, stuff like Stronghold, Fantasy Empires, Spelljammer, etc. And i'd probably even go for a new copy of Star Control 2 for $6, despite the existence of the free Ur-Quan Masters port. After all, if nothing else if it got a lot of sales it might help promote the creation of a new "real" sequel to Star Control 2 :)
And of course, it would be really nice if they eventually managed to pick up Red Alert 2 ;)