Review our UI mockup tool, ScreenSketcher
petervandijck: Awesome. I am an information architect and I've used almost every tool out there. It's simple, and that's awesome. Needs some serious thought about what NOT to include (as you'll get 1000s of feature requests). Love that it's fast and installs fast. IF you can create an efficient way to share/discuss pages, you are adding value that no other app in this market has nailed (afaik). Feel free to ping me to discuss :)