I use a Roku soundbridge, and it is pretty great. We have a Mac setup to run iTunes in a user account that just stays logged in, and it's always up and running. Other users use the Mac don't even notice the iTunes footprint in the other account. Great setup, for music we encode mostly with iTunes and mp3 392kbps vbr. Sounds great!

Also poscasts are really great too, and iTunes snags every new one and downloads it with no intervention. I would never go back to shuffling CDs again.