"Dr. Steven Chu was confirmed on January 20, 2009, as the new Secretary of Energy."
That statement and Dr. Chu's photo appear on the DOE website this morning, though DOE has yet to issue a press release, post his bio, or update it's org chart. The new stealth Secretary of Energy also seems to have taken LANL's NewsBulletin by surprise. They don't mention his confirmation at all.
Welcome aboard, Dr. Chu!