For $475, a single hunk of solid .925 sterling silver cast as a LEGO Minifigure wouldn't do me much good. But divide that hunk of sterling into 8 separate pieces, and then rejoin them as fully moveable and poseable parts, and suddenly the possibilities for entertaining myself with Metalfig v. Minifig octagon fights over the foreseeable future are nearly limitless, and the price for the collectible LEGO piece a little more palatable.
Armed with CAD knowledge and a 3D printer, Jonathan Brady designed and brought to fabrication these sterling silver kinetic Minifigures, and now hopes to raise funding for their full production through Kickstarter. Through a fascinating process of reverse engineering and critical thinking, Brady was able to modify the Minifigures' joints and assembly method to accommodate his medium, a metal far denser and less malleable than the ABS plastic LEGO uses. As a result, all LEGO man connection points, including the hands, have full ranges of motion. (Read more about Brady's troubles along the way--such as the fact that ABS assembly relies on elastic deformation of the plastic, and to achieve the same effect with sterling he would have needed to generate a 3000 degree F temperature difference--on his campaign page.)
The march towards metal Minifigures continues on Kickstarter through May 28, 2013. In addition to the fully poseable sterling option, backers can times 10 their pledge to $4,250 and get a LEGO man in solid 14K gold, or shell out $9,000 to be the only person in the world who owns the single platinum Minifigure Brady is down to produce. Moving farther south of cost-prohibitive, a $270 pledge will return a solid sterling silver Minifig that still looks cool, but won't be able to strike Matrix-like poses.
November 2013 Update: Funding for this project was canceled by the project's creator, Jonathan Brady, who does not appear to be selling the metal minifigs elsewhere. However, he does have a Website, Brady Kinetic Curiosities, which may provide future product information.