Now we know that Time machine will require a mac to sync with an external storage at least once a day or so. I'm just wondering what would be a good back up solution for a macbook or macbook Pro, since we wouldn't like having to carry an external HD with us at all time and syncing with a server would likely be quite slow. A laptop with built-in secondary hard drive, just for backing up purpose, sounds like a neat idea. Of course, this needs a major redesign. Do you think a 1.8" drive will fit nicely in a laptop? Let's share some ideas.