I don't usually listen to music on my computer, I just load up iTunes and stick it on my iPod and take it away. However I just updated iTunes over the weekend... and now it doesn't load anymore. So I'm stuck on my podcasts and such.

When I do listen on my computer, I use this nifty program called 'Quintessential Player'. It's pretty cool, highly reccomended.
I use WinAmp whenever I wanna watch that Jpop channel.