The GAO did a study of US anti-piracy efforts and the results are not good.
“…from 2007 to 2009, the most recent year for which complete data were available, the total number of hijackings reported to the International Maritime Bureau increased, ransoms paid by the shipping industry increased sharply, and attacks spread from the heavily patrolled Gulf of Aden–the focus of the Action Plan–to the vast Indian Ocean.”
Seems we don’t know how much piracy costs or how much our countermeasures cost. We have made some progress in international cooperation, but we haven’t done very well at coordinating efforts within the US government.
At least one commentator thinks the process of learning to work internationally may be more important than the actual results. He also kicked off some additional discussion here and here, including discussion of how this reflects on the Cooperative Strategy 21. (It does look like the Brits are showing some initiative.)
The Coast Guard has already been deeply involved in this issue, from LEDETs on scene to recommending best practices to mariners, and if it ever to be successfully addressed, it will be part of the solution.