I posted info earlier about Costner's company that makes an oil and water separator, and now BP has tested and bought 32 of the machines.

From the AP:
Also, BP spokesman Bill Salvin told The Associated Press that the company has contracted with actor Kevin Costner and Ocean Therapy Solutions to use 32 of their centrifuge machines that are designed to separate oil from water.

"We recognized they had potential and put them through testing, and that testing was done in shallow water and in very deep water and we were very pleased by the results," Salvin said.

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The skimming barges have been filled mostly with seawater and some oil, but using the centrifuge, the barges can be filled with a majority of oil combining skimming with the oil separating centrifuge.