When he treats web design as a craft, Jeffery Veen ends up "delivering solutions to my clients that are far less complex to implement, are much easier to maintain, cost exponentially less to serve, work on multiple browsers and devices, do way better in the search engine lottery, and -- of course -- are accessible to everyone.... And try to argue with the business value of that." As good a business case for web standards, XHTML and CSS as I've read.
