Foreign Policy, April 7, 2010 – We’re a little late to this story, but this is one hell of a lede graf from the Financial Times:
Has a record-breaking British powerboat become the “ultimate toy” for an Iranian playboy or – as US investigators fear – is it now equipped with the world’s fastest torpedoes aimed at sinking an aircraft carrier in the Gulf?
The boat in question, the Bladerunner 51, was used in 2005 to break the world record for the circumnavigation of Britain, and passed through at least two owners before it was picked up by the Iranians in Durban, South Africa.
Advertised as “the ultimate toy for someone looking for something a little bit special,” U.S. authorities fear it could be equipped with torpedoes and tried unsuccessfully to block the sale.
Iran has flirted with speedboat attacks  before, but some experts don’t think the Bladerunner will significantly increase their capabilities:
“Though the US Navy is very concerned a swarm of small boats can overwhelm and sink a large warship, the hypothesis is untested.
It has never been done,” Mr Hooper told the FT. “A small, fast boat navy is nothing more than a surprise strike and harassment force. Every time small, fast boats run into helicopters, the helicopters win.”
So while it would definitely make a good plot device for a James Bond move, Iran’s fleet of super-speedboats is probably not much of a threat for the time being.