Jeremy thinks if JotSpot stopped calling themselves a wiki they’d do better. I think if they offered a hosted version they’d do better. It’s far too powerful a system at this point to only be sold to organizations that have no IT departments and have no data security concerns.
I’d also note that I used to hate the JotSpot idea, but they’ve really developed it nicely and I think it could be even bigger if they provided a self hosted “enterprise” solution.
Also see Webjillion for more inside scoop.