Mia Northrop, Senior Site Producer at Seek was interviewed by Ron Jacobs from Microsoft/ARCast when he was out here last year. They talked about Seek's approach to user experience, and particularly low-cost options for evaluating ideas with real users, like paper protoyping.

See Mia up in pixels here: http://www.skyscrapr.net/blogs/arcasttv/archive/2007/03/06/828.aspx.