For projects where I'm working alone Dropbox serves as a sweet and simple version control system. Occasionally I will decide to share the project with a collaborator and then I will want a little more control of how the version control is managed.
It would be awesome to be able to export a dropbox folder and it's history to a Git or SVN repository in these situations. This is not an option now (as far as I know), but I am curious:
Does anyone know if Dropbox is already built on top of one of these systems?
If so, what level of access does one have to the version control system from the API (or otherwise)?