Jim,
Here's my thing. I'm totally confused by "usability". Is it a function of web design? Then shouldn't it go in the web design forum? Or is its purpose to serve the marketing objectives? then put it in the marketing forum.
See, I'm confused. What is one principle of usability that does not fall under another category? (That is NOT a rhetorical question.)
Usability - help me out here. What purpose does it serve (besides itself).