Hey desk jockeys, here's some legal music you can listen to on the computer.
NPR has been internet broadcasting a series of concerts from a club in Washington DC. They get some good bands (your mileage may vary) and you can listen on demand. Audio quality varies from one show to the next. Some of them, notably Son Volt and Bloc Party can be downloaded in MP3 format so you can take them with you. Most of them have to stream. Check back because they keep adding more.
Also of note is NPR's podcast directory. You don't actually need a dorkpod to listen to any of it (but that's how I do it). Itunes on the computer will do fine, or look up podcasting on wikipedia for much more info.
NPR Live Concert Series
NPR podcast directory