I was listening to a podcast on the way home (Macbreak Weekly) and they were discussing the update so when I got home I just clicked on the Apple menu, selected software update and it took care of both of them. I launched iTunes and didn't notice anything different. I did, however, find it disappointing that the power management options that used to exist are still missing from Snow Leopard. I don't seem to get anywhere near the battery life that I used to out of my Macbook.