A great site for anyone that likes internet radio is Tuner 2, which filters out the cream from the crap, and give you the best stations to listen to. Using the AACplus codec (available in the latest Winamp), you get CD quality music at half the bandwidth.
One of the stations that is a big favorite of mine is the top one on Tuner2, SomaFM’s Indie Pop station, which has been playing some really superb music as of late. From The Arcade Fire, Say Hi To Your Mom, Weakerthans, Elliot Smith, and more. It doesn’t get any better.