previously i had only used the On-the-go playlist a couple of times, but recently i was gone for a week and used the feature a lot. on my old iPod (3g) i could create multiple on-the-go playlists, but there doesn't seem to be that option on my iPod touch. you can create, edit, and clear the playlist, but you can't save it like you could on other iPods, allowing you to create additional On-the-go playlists. i haven't got the 3.0 software update yet - does it add that feature? i checked the "100 new features" thread in the iPhone forum but didn't see it mentioned.