HMD
comparison --
www.stereo3d.com/hmd.htm
cybermind (NL) --
www.cybermind.nl/home.html
(pricelist) --
www.cybermind.nl/Info/PriceList_EUR2003.htm
micro optical --
www.microopticalcorp.com
personal display (japanese) --
www.personaldisplay.com/