A Cultural Geography of the United States and Canada (via brad_beaulieu). Census data, sorted and graphed on a map of US/Canada based on various cuts like ethnicity, language, economics, etc.
The story "The Stolen Word" by Lisa Mantchev in Fantasy Magazine sparks a big discussion on -isms (racism, sexism, etc) and privilege. (Link via David Moles, who also provides a helpful bingo card for the discussion). Extremely enlightening. When we write we're working with a whole collection of attitudes and opinions, some we're not even aware of until someone points it out. Much to think about here (with good links to resources from various folks).