My good friend (and one of the smarter developers I know) Carl Coryell-Martin came back from the ETech conference this year very charged up about Kathy Sierra, who among other things writes a blog called Creating Passionate Users.  She's an ex-Sun employee who has written a best-selling series of technical books that apply the neurobiological principles that help us become passionate, masterful users of technology. 

Her blog is well worth reading for anyone who's thinking about how to nurture and grow the Plone community.