iTunes in Linux
iTunes runs under Wine, albeit rather slowly. I can attest to this as I have personally installed in on the Ubuntu 8.04 64-bit partition on my office computer using the newest stable version of Wine. I have not tried the store, but DAAP (the protocol that allows iTunes to share music with other computers) works flawlessly. Music plays without skipping or lag, but scrolling through your library can take an exceedingly long time.