J.D. Power, the market research and forecasting business owned by McGraw Hill, has acquired blog-oriented market research firm Umbria. The Boulder, CO-based firm tracks and analyzes how client brands are being talked about on blogs, message boards and other social media platforms. The idea is pretty straightforward: J.D. Power, which already does this through more traditional means, wants to add a social media component. Competitors include Buzzmetrics, which was acquired by Nielsen; Cymony, acquired by TNS; and independent Buzzlogic.