Have you had some time to play around with iTunes 9? Notable features include home sharing, improved syncing and a redesign of your iTunes library and the store. But my favorite new feature is the Genius Mixes.
If you're already familiar with how the amazing music suggestion tool iTunes Genius works you can instantly get in on the Genius Mixes fun. Just click on the genius tab on the left pane of your iTunes window and under the usual Genius heading you should see Genius Mixes. Once you click on it, iTunes will automatically search your library and find songs that sound groovy together and whip out anywhere from one to 12 music mixes for your listening pleasure. Talk about such an easy way to get the party started!