The EBGames website has

for Metal Gear Solid 3: Subsistence Limited Edition. A few days ago we repored the existence of the 3rd disc (previously exclusive to the Japanese version) and a pre-order bonus containing a featurette called Metal Gear Saga. Now we can confirm that there will be two versions of the game released. You can get the Metal Gear Saga disc, featuring an embossed cover with Yoji Shinikawa's artwork, by pre-ordering either version, but the 3rd disc will only come with the Limited Edition for the price of $39.99. Either way, the package is a steal. Subsistence contains a new online mode, a 3rd person, behind the back view, and plenty of extra content for MGS fans. The game is currently scheduled for release in mid-February.