I never got around to doing anything about it (mainly because I have no need to), but yeah, I know.
I think the idea with drop box was that you made a folder in your computer where you simply drag/drop stuff into it, and it actively syncs with the server, and any other "synced folders" on other authorised computers, as well as the more regular upload-and-share type.
Bandwidth kills this shit in Australia though. Hopefully I'll find more use for it with the new national broadband network (whenever that gets around).