Richard over at Rebuilding Place in the Urban Space has an interesting piece fully titled Gentrification, Neighborhood Change, and Wacked Discourse. It's partly a response to the recent Census news that DC's Black majority is slipping away (i.e. the District is becoming more racially diverse), and news coverage on the topics. Definitely worth a read. Oh, and if you missed Is Commercial District Revitalization Racist? you should read that one too.
Reader "Rayful Edmond" suggests a quick read of Clutch Magazine's The Great White Scare Coming to a City Near You. I agree, and don't forget the recent City Paper article Confessions of a Black Gentrifier.