So here's the latest press release from Deepwater Horizon Incident Joint Information Center:
 THE DEPARTMENT OF ENERGY’S  SCIENTIFIC RESPONSE TO THE OIL SPILL
Secretary Chu and the Department of Energy’s National Laboratories  are providing round-the-clock scientific support to help inform  strategies to stop the BP  oil spill.  Secretary Chu and his team of scientists are  brainstorming ideas about the most effective scientific and engineering  approaches to the problem, providing expert advice and technical support  validation, testing assumptions and making engineering calculations to  help BP think through their approach.  The Department of Energy is also offering  its resources and technical assistance to the Flow Rate Technical Team  led by MMS, NOAA  and USCG.
- At the request of President Obama, Secretary Chu has assembled a  team of scientific experts from inside and outside of government to work  on the problem, and is engaging with these experts and BP officials on a  daily basis.
- The Department’s laboratories are providing on-the-ground technical,  engineering and scientific support at BP’s Houston Headquarters. At any  given time, those labs have at least 6-8 experts on the ground  supporting the response.  To date, more than 150 personnel from the  National Laboratories have directly supported these response efforts. 
- Experts from the National Laboratories provided diagnostics of the  damaged blowout  prevention equipment on the ocean floor through radiography  (analysis, design and fabrication efforts) and with innovative,  nonintrusive approaches for measuring pressure at various points in the  system.  The Department  has provided BP with high-quality 2D radiography that BP personnel are  saying breaks all records for deep water radiography--breaking the  previous record by more than 4,000 feet.
- The Laboratories have also provided BP with structural analysis of the failed riser.   This allows various drill pipe, casing and riser scenarios to be  evaluated. They also predicted the structural integrity of the riser  kink under different flow scenarios and used sophisticated analysis of  computer-estimated fluid flow inside the nonfunctioning apparatus.
- The Department of Energy is supporting the National Infrastructure  Simulation and Analysis Center (NISAC), which has been modeling the  economic costs and societal impact of the oil spill on energy and other  industries in the Gulf and along the coast to support the response  efforts of the National  Incident Commander and the Unified Area Command. NISAC is a  modeling, simulation, and analysis center within the Department of Homeland Security (DHS) that  leverages national expertise to address infrastructure protection.
- Using the Interagency Modeling and Atmospheric Assessment Center  (IMAAC), the Department’s scientists provided smoke plume predictions  for the original fire on the platform and surface-oil test burns. 
For information about the response effort, visit www.deepwaterhorizonresponse.com.
Funny thing is: Watching Rachel Maddow when Secretary Chu was on for Geek week (video link below) one got the distinct impression that he wasn't really sure what was going on down in the gulf. Or if he did he was very limited in what he knew. The Huffpost article on the interview had this take on the awkward moment, 
"After Chu twice suggested that he only knew what he learned from media  reports, Maddow mused, "Mr. Secretary, I would say I'm worried that you  only know what you read in the papers about what's being approved."" 
http://www.huffingtonpost.com/2010/05/25/rachel-maddow-kicks-off-g_n_588427.html