Daeyang E&C Cy-Visor
The Cy-Visor is a mobile LCD personal display with a 44 inch virtual image.
General HMD information
Steve Mann has created a page on building your own head mounted display. Although a bit dated, the information is still relevant.
Intersense Eyeglasses
Intersense sells a lightweight HMD which has earphones built in. Marketed as VR glasses, they also come with a head tracker but unfortunately have only NTSC and PAL output.
Interactive Imaging Systems Vfx 3D
A virtual reality HMD which may be useful for augmented/mediated reality.
Kaiser Proview family
The proview family of HMD's marketed for augmented reality. Through the use of LCDs, the ProView headset is lightweight, comfortable and user-friendly.
Liteye-B
One thing I like about the Liteye is that you can buy an OEM package which just has the display which you can mount on your own glasses. They have both colour and greyscale displays.
MicroOptical lntegrated EyeGlasses
MicroOptical has two great solutions for the person in need of a lightweight solution. They offer both a clipon display or a covert display.
Microvision HMDs
Currently in the development stage, microvision expects to release a wearable "augmented reality" display which can be incorporated into eyeglasses, goggles or helmets. Only time will tell.
OpTechs HMDs
OpTechs sells several different HMD's from medical uses, to industrial, and personal use.
Personal Monitor PM-1W
Personal Monitor's PM-1W is a wireless headmounted display which only takes up 5% of the visual field. If you don't want wireless, they also sell wired versions.
ProView 60
The ProView 60 is an HMD system with a 60 degree field of view, full colour VGA resolution, and the option of two vga inputs.
Skyex Personal Monitor
The Personal Monitor (PM) projects a high resolution color video image that appears in the person's line of sight in a viewing angle comparable to viewing a 26" monitor from 2 meters (6.5 feet) away.
TekGear's M2
The M2 is a high end portable viewing device providing a true 800x600 full color display. The M2 is an excellent CRT replacement. It is lighter, smaller and draws much less power.