I just ordered 2 new ipods from apple (10 and 20 gig), one for me and one for my wife. We are really excited to incorporate these into our lives. I have a few questions.

I have already downloaded itunes and started exploring it. My wife and I have different tastes in music. Is there a way to keep our music seperate from each others ipods so when I sync my ipod to our pc itunes doesn't download her music folders onto my ipod and vise versa?

Any recommendations for a case (specific brand and model)?

How about a case suitable for exercising with it (maybe an armband type)?

Thanks for any responses.