Just wanted to share this. One player worked with Funcom to produce an expanded 56-track, four-album soundtrack and put it out there for free. Some of it has been released before and other tracks are new (well, new to an MP3 release, at least).
You do have to install AO on Steam and get this DLC, but when you do that you can grab all of the tracks out of the folder for safekeeping and then delete the game if desired. Just really cool stuff, this OST is one of my all-time favorite MMO scores.