title: Turning a screenshot into a prototype with Grails
body: <p>We're beginning to design a new product, and our UI guy is knocking out screenshots like there's no tomorrow.  Our boss, though, wants to be able to actually interact with the site as it would look with various features and skins.  I can whip up simple features pretty quickly with Groovy on Grails (or any of a dozen other options), but what I don't have is a really quick way to turn a picture into an interactive website.  Is there an application out there that takes an image, lets me mark certain areas as "input box named X goes here, this bit is a button that submits to the Y controller", and then generates some HTML that my boss can muck around with and we can all iterate off of?</p>