The first prototypes were delivered to the Army in 2008, according to the schedule (as I understand it). Soldiers will begin using the systems this year (as stated in the Strategy Page post) and deliveries of NLOS Cannons to the Army’s Evaluation Task Force as part at Fort Bliss, Texas will begin next year.
The comment contains links to additional information. Good stuff.
Also, check out the NLOS-C video from a little while back. As I said back then, if you like things that go BOOM, you’ll like the video.