I'm aware of, avidly use, and dearly love Dropbox, but for this particular use I cannot use my personal account, and the nature of the Dropbox tool makes it tricky if not difficult to manage more than one... Hmm, unless I create another user on my local host. I'll have to think about it.
Update: I've thought about it. Probably not a good idea. It would likely provide far less permanence than a hosted solution would.