Earlier quoted context omitted.
I think you completely misunderstand the audience for Rachet. It's a HTML/JS/CSS prototyping tool, so if you're building a web application for iPhone it makes it so much easier to get a basic prototype together and start hallway testing. Interface builder is _not_ the tool for doing this. Additionally, just because you're not 'creating stuff like this in graphics' doesn't mean that you'll never create a proper interf…
How is this better than pencil and paper. You don't have to see the button depress to know what the button does, right?
Users can't interact with paper mock ups.
You have to re-draw the menu on every page you mock up or tell the people you're showing the mock up to imagine it. Both of these suck.