The CV-22 Osprey, a tiltrotor aircraft built by Bell Helicopter and Boeing, is moving through the necessary phases required to certify it as fully mission capable, ready for combat use by the US Air Force Special Operations Command.
Final delivery of the iarcraft to Special Operations is scheduled for 2009. Before that the aircraft has to go through a series of what amounts to acceptance tests and points of validation to ensure it's capabilities to make sure that it is up to the job. Says 71st Special Operations Squadron commander, Lt Col Jim Cardoso, "We're basically trying to help find out if the electronic warfare system does what the contractor says it will do...We're helping to find out if the CV-22 is operationally suitable to do the mission." The whole article is here.
For my part, I'd love to see one of these in the real.