I love Time Machine, but I still think it's incomplete. I'd love to be able to back up different stuff to different disks: this way, when I'm home I could back up the whole system on my large 500GB external drive (as I use a PowerBook), and when I'm on the road, I could back up only some relevant folders on my external 30GB hard disk. With Time Machine, you can back up to different disks, but you can't back up different stuff to different disks.
Before reading on, please understand that the following might be dangerous to your data: please back up on a different disk before proceding. I am not responsible for any data loss you might encouter; this hint has only been tested by me! You should also know that this hint causes (I still don't know why) the deletion of the data contained in the folder /.fseventsd/. I thought this would cause a big mess, but everything seems to w...