The official Kojima Productions' Metal Gear Solid 4 "Goods" page announces:
"When famed Japanese toymaker Medicom releases the Metal Gear Solid 4: Guns of the Patriots Snake figure later this year, they hope to teach us all a very valuable lesson: that you can still look like a total badass...even if you're only 12 inches tall.
Featuring Medicom's RAH 301 technology, Snake's exoskeleton can be posed in a variety of stances while maintaining a realistic body line. Developed by the mad scientists at Medicom, and meticulously tweaked by MGS4 art director Yoji Shinkawa, the MGS4 Snake figure is scheduled to ship this November."
There are 8 pictures of the figure at the link.