Marketplace as a Service? If that's what this is, and it sounds like it, that would be fantastic. For the last year or two we've thought that a marketplace would be a great potential fit for our app, but simply don't have the resources to build and maintain the infrastructure ourselves.
Done, thanks Bubs. Can't wait to get ahold of this. :)
The Second Life Marketplace (for the virtual world Second Life) is something like this Photoshop Extension, enabling any SL user to sell their creations to other SL users.