Seeing the face shields on the one prototype in the link above made me remember these. They are made by an Indiana company. I have little to no info on them, did meet one of the "investors / consultants." He is a fellow soldier whose buddy started the company. I have little information on them, but they do look interesting. Curious: would anyone here actually wear a helmet with face/cheek shields?
http://www.mtekweaponsystems.com/
http://www.youtube.com/user/MTEKWEAPONSYSTEMS