As an SMB: I'd confirm that there is need for document management & versioning. As a technical person, I'm trying to craft time to build a document versioning & collaboration utility from existing open-source management & versioning (think of writing a desktop app to talk to a subversion back-end but as a document management & collaboration app) aimed at the various project teams in our org.

There might be that not all that visibility of SMBs of the problem. If you can clearly articulate a pain point that they will respond to, you'd have a potential winner.