Here are the slides from my presentation at BarCamp London a few weekends ago. Sorry for the delay, I was hoping to secure permission to distribute the slides with one of the images I used at BarCamp, but I wasn't able to.
Download the slides (624kb gzipped PDF)
The two books I referenced most in the talk were Norman Potter's What is a designer?, (buy from Amazon...) and Eric Evans' Domain Driven Design, (buy from amazon...). I also name-checked Hyphen Press' Anthony Froshaug biography/retrospective (buy that from amazon too...).
The presentation itself was a little less coherent than I'd have liked, but the main themes (however buried they were) are ones that I'm going to try to explore in more detail in future.