Very interesting article, and when you think about it, Keynote makes a very good prototyping come web design app - especially when you need something flexible, that can output HTML and can show interaction before you commit to a site build.

Especially cool since I have met Eric Spiekermann, briefly, and his ideas on design are very cool. I also like their site, which is blog driven, so unlike many design agency sites which opt for the standard brochure site approach, that - once you have visited it once - there is no need for a return visit.

ESPI at work: The power of Keynote | Edenspiekermann