Ron and Amy Jo Proctor at Weber State Universe 3D have created a "low cost apparatus for capturing stereoscopic video". I was sold at apparatus and the total cost: Only $250. Here's the shopping list.

• 2x Kodak Zx1 Digital Camcorders
• L-Shaped Extruded Aluminum
• 2x 1/4" Nylon Washers
• 3x 1/4-20 Wingnuts
• 2x 1/4-20 Panhead Machine Screws
• Tripod with Quick Release Shoe

That's it. Put everything together as shown in their page, and create 3D videos like this:

For the Avatar bit, just apply generous blue powder all over your body. All of it. [Savi]