[notahacker]

If there is a lucrative untapped market for that sort of thing it might possibly be in the enterprise market, where corporations/governments are worried about both data loss and the security implications of storing stuff on others' servers (I'm assuming it syncs files and devices in ways that go above and beyond simply offering the standard option to save everything on the company's network server)

Then again, it's a much harder product to build and market to enter...