When you rate a song on your iPod is that rating information relayed back to iTunes. I'm taking a trip and managed to cram nearly my entire collection on my iPod. I'm hoping to take this time to rate my tracks so I can weed out which ones I want and don't want.
Also this is just wishful thinking but wouldn't it be sweet if your iPod could tag your tracks properly and if you could set cue points. Like I said wishful thinking.