Several months ago I wrote about the Reevu motorcycle helmet with integrated mirror (link). The helmet is not yet available (hopefully shortly), but for those that want to see what's happening behind you without having to move your eyes too far, here are some other solutions:

This "glue-on" helmet was designed for ATVs. It sticks onto the front of your helmet and allows you to see what's happening behind you.
http://www.atvstuff.com/images/mirror.JPG
http://www.atvstuff.com/images/v1/eagse247.htm
Cost US$ 10.95.

BugEyes
BugEyes from TurnCo is a similar product that is stuck to your helmet using an adhesive pad. The mirror swivels and is aerodynamic (one wonders until what speed the mirror stays on?).
http://www.bugeyes.com/art/grnhlmt.gif
http://www.bugeyes.com/index.html
Cost: US$ 10.95.

Personally, I prefer to wait for the Reevu helmet....

The previous post is here:
http://motorcyclephilippines.com/forums/showthread.php?&postid=39907

Hi sir Frank,

Hope you mind me asking. Were you able to have the helmet with built in rear view mirror? How was it? How much does it cost?

Thanks:)

I haven't seen one yet. As soon as there is a distributor in the Philippines or Hong Kong I will take a look but there are none so far that I know of.