Time Machine sounds great. It backs up your system automatically every hour. This makes sense on an iMac, but for those with Macbooks, how do you plan on using Time Machine? Do we periodically "dock" the Macbook to a harddrive, and will it know to do its backup then automatically? Or do we need to tell it to backup manually? It would be nice if the Macbook could when sleeping, or nightly, send via wifi any changed files to the hard drive as part of Time Machine. So you would have a hard drive on the network. The Macbook sits anywhere in your house connected to your network. On its own in the background, the changed files are sent to the HD wirelessly. I think that the very first backup would need to be done with an attached HD, but all the subsequent backups should be relatively small files, and could be handled wirelessly. What do others think?