Windows Media Player supports fast and slow playback. While I have never used slow playback, I absolutely love the fast playback feature. Plain and simple, I want fast playback on the Zune -- both the Zune device and the player on Windows. Why the heck would I want this? Simple: casts. I watch/listen to a number of casts and when I do, I like to get thru them as quick as possible to maximize my time. Sure, I don't want to listen to my songs with fast playback, but having the capability for casts would be outstanding.