And something on HUD hardware: http://augmentation.wordpress.com/20...than-expected/

In summary: there is no see through consumer device yet.

Edit: I'm also in email disucssion with Vuzix europe representative trying to coax some info out of him (like will the display driver for the non see through stereo glasses totally freak out if one display is removed [which would allow a "glance" monocular "HUD" with one display])