Here's one I've been waiting to see. They've built a rear view mirror into a helmet. That's right! Check out their web site at: http://www.reevu.com/index.asp
Pretty cool! I talked to them about three months ago and they told me that they had no idea when or if they would ever import them into the US though. Maybe our European brothers will get lucky enough to get one...
I got an email back this past week that they are previewing in Europe and supposedly waiting for D.O.T.'s blessing for the States. If push comes to shove........ I'll probably have one of my buddies over there get me one and ship it over. I'll worry about the D.O.T. at this end!
Let me know if you hear anything else and I'll do the same.