Most out are. Ones off the top of my head are the Louis Garneau, Rudy Project, Limar and Las. Though so far the Bell Meteor 2, and the Giro Advantage, and Advantage 2 are NOT. (the advantage is the euro model, and the advantage 2 is the proposed us model that has not passed north american helmet standards).
http://www.triathletemag.com/Departm...d_for_Kona.htm