Seven cabinet members confirmed today.
Energy - Steven Chu
Agriculture - Tom Vilsack
Interior - Ken Salazar
Veteran's Affairs - Gen. Eric Shinseki
Homeland Security - Janet Napolitano
Education - Arne Duncan
OMB - Peter Orszag
Robert Gates had already been confirmed as Defense Secretary under Bush and didn't require re-confirmation. This is also why he was left behind today from the Inaugural festivities as the designated "line of succession" individual.
Hillary Clinton will probably be confirmed tomorrow. So at least there's a partial Cabinet in place.
...Obama also blocked every pending regulation from the outgoing Bush Administration until they can be reviewed. This doesn't stop all or even most of the midnight regulations, but it's a good start.