I have been using a Zune for about 8 months. I have found more uses for it than I originally imagined. With music, audio books and movies, it is a great travel and leisure companion.
Ipod Lounge's approach of "Pay as you go" or "By the drink," if you will has a great deal of appeal. I seldom "join" anything and many of the annual fees associated with MP3 services and ownership are frankly a turn-off. Ipod Lounge is an excellent, very easy to use, service for MP3ers such as myself.