Malcolm Wallace
I would go with Bret Victor's argument (http://worrydream.com/ MagicInk/) that the concept of user interface as primarily _interaction_ is misguided.
I tend to disagree. But then I'm a game developer, not an HTML monk... what definitely makes sense, though, is to divide the gui visually along presentation of the world vs. presentation of your interface to the world. "presentation of your interface to the world" subsumes such things as the marker on the minimap that shows which part you are looking at, and what tool you selected to interact with it (say zoom, smudge, paintbrush) -- (c) this sig last receiving data processing entity. Inspect headers for copyright history. All rights reserved. Copying, hiring, renting, performance and/or quoting of this signature prohibited.