Just got my DropBox account set up. For those not familiar, it is versioned storage that you can just mount on any of your machines. Instant synchronization, and versioning. Behind the scenes I think it is just svn, macfuse, and growl, but having such a simple interface is very nice. I'm only just starting to play with it, but you can think of it as off-site-timemachine without the star trek interface plus it has the ability to selectively share content/photos/etc publicly or with friends..