Speaker of the House John Boehner
Interesting note: Of the 193 House Democrats in the 112th Congress, 19 declined to vote for Nancy Pelosi as Speaker.
UPDATE - Speaker Boehner delivered a short, no-frills speech to the new Congress after taking back the gavel. Pelosi introduced him; her speech was longer than his.
UPDATE II - Video of Boehner seizing the gavel and his brief, workmanlike remarks: