I never heard of the following. The Fry's ad I found it in included a picture, which shows a black box like a projector in front of a ghost-keyboard. Here is the Fry's ad. (I'm not saying it's good, just interesting. BTW: price was around $160.)

Golan Virtual Keyboad
Golan:
FRYS.com #: 4914371
The Virtual Laser Keyboard (VKB) leverages the power of laser and infrared technology and projects a full-size keyboard onto any flat surface. As you type on the laser projection, detection technology based on optical recognition enables the user to tap the images of the keys, complete with realistic tapping sounds, which feed into the compatible Bluetooth-enabled PDA, Smartphone, laptop or PC. Unlike many small snap-on keyboards for PDAs, the Virtual Laser Keyboard provides a full-size QWERTY keyboard. It is also smaller and more convenient to use than the folding-type keyboards made by some manufacturers and similar to them in functionality. There are no mechanical moving parts whatsoever in the Virtual Laser Keyboard. It provides a projected image that is the perfect portable input device for PDAs. It's similar in responsiveness to regular keyboards. The light weight device weighs two ounces and is similar in size to a disposable cigarette lighter. The Virtual Laser Keyboard includes a self-contained, rechargeable lithium ion battery. It provides the Virtual Laser Keyboard with its own internal power supply, so it doesn't drain any battery power from the PDA or PC. The battery lasts two to three hours, more than enough time to do some instant messaging and SMS messaging from the handheld device or to update calendar and phone book entries.

That thing is a couple of years old and was crap then. Maybe they improved it, but I wouldn't count on it to be of any use icw a N800.

Neat concept, poor implementation - you need a flat surface.
Try the iGo BT from Amazon - it's been going for $30.
search here for it.

It's a nightmare for touch typists.

Yes, I don't need to search for the iGo bt keyboard, as I already own one.

Thanks for the info.

Karl ended up in a secret prison for 2 months in 2006 because every time you use a laser keyboard the terrorists win.

Heh. At least I got out...