I'm planning on taking advantage of the Time Machine when Leopard comes out. I'm going to have to partition the hard drive and set aside some HFS+ formatted space solely for the TM... My question is... how much? I haven't yet bought the external drive because I'm going to get the AirPort, so I want to use the USB 2.0 port feature so I can put my media on it and be accessible by both Mac and PC. How big an external drive do you think I should get? I was thinking 500.. It'll be some movies (but not an unreasonable amount... but mostly music, pictures, etc). And how much of the hard drive do you think I should set aside for the TM?