This is pretty cool stuff. You can use it to sync stuff between computers, hardware independant:
"Dropbox allows you to sync your files online and across your computers automatically.
* 2GB of online storage for free, with up to 100GB available to paying customers.
* Sync files of any size or type.
* Sync Windows, Mac and Linux computers.
* Automatically syncs when new files or changes are detected.
* Work on files in your Dropbox even if you're offline. Your changes sync once your computer has an Internet connection again.
* Dropbox transfers will correctly resume where they left off if the connection drops.
* Efficient sync - only the pieces of a file that changed (not the whole file) are synced. This saves you time.
* Doesn't hog your Internet connection. You can manually set bandwidth limits."