I am getting Leopard tommorrow and have a couple questions about Time Machine. 1. Earlier I posted about using it through a Airport Base Station drive. It seems it's now confirmed it won't work with ABS drives. I would like to think in the future it'll be updated to support this. I know my ABS drive can be slow and doesn't do well with large file transfers so maybe that's the reason. I see it works with 'network' drives though. I'm wondering, a. Would it work with a hard drive that is connected directly to a ethernet network? b. I use my MacBook Pro a lot and don't want to have to carry around an external drive with it. I'm getting a iMac within the next month though. If I plug an external drive in that would it work with that drive? 2. What size hard drive? I have two MBP's I want to use with two drives (on a network or on my iMac) and one is using around 140GB of space, the other around 110GB of space. What size hard drive should I use for backup? I know I want at least the amount of the laptop but I've heard the TM doesn't compress so for storing backups since it is storing back in time I'd assume I want at least double if not more, maybe 500GB or more. Is this true? I know the answer is probably the larger, the larger I go back in time and I know with time if you run out of space it starts erasing.