I've been thinking about a future configuration option, and was wondering if anyone had any thoughts about it. I have an external drive plugged into an iMac at home, and relatively frequently access files from a MacBook from it. I'm thinking about getting the AirPort Extreme because that would automount the disk on both computers, share my printer more seamlessly, and generally make things flow easier. However, a recent drive crash has also made me realize that I can't do this without the securitiy of backups. So, realizing that info is very sketchy on Time Machine, how does everyone think that it might be able to work on an Airport Disk? 1) Do you think it would be possible to have a large external Airport Disk, have an additional USB hard drive attached to the iMac, and use Time Machine to back up both my iMac and the Airport Disk? 2) Keep sharing my drive on the iMac, and use the Airport Disk as a Time Machine drive to back stuff up to? Could I have documents on the Airport Disk AND use it as a Time Machine drive? 3) Use some other utility to back up the Airport Disk? I'm just trying to figure out some "best practice" plans here so that I can have my files accessible from the iMac and MacBook and not have to worry about backup.