While everyone is looking at DomainKeys as a method of controlling spam, I think the implications are much broader. I first saw that DomainKeys could be harnessed to stop comment span on blogs, then my thinking got even wider; here is a piece of infrastructure for enabling 'identity' on the web using public key encryption and tied to the indentity platform that is DNS. Now some may cry foul that DNS is evil because it is a centralized service, but the important point is that it is a centralized service with a system already in place for distributed authorized updates. How soon until having your own domain name with a public key stored ala DomainKeys is a critical part of your online life?
The myth of interference. Information and electromagnetic radio waves are not physical objects and can have some pretty counter-intuitive properties.
I wonder how many millions of dollars of research time Bruce Sterling has just sucked out of Microsoft all for the sake of having a better party next year?
Kottke mentions Jane Jacobs' The Death and Life of Great American Cities as an inspiration for organizing offices. I'll write more later about altering books, books that I've read that have changed the way I see and think about the world. Jacob's book is one of those.