Play with the Metal Gear Solid 4 website, get trained by Otacon

If for some reason, you haven't had enough Metal Gear Solid 4 news as of late, you may want to take a break and play with the official Metal Gear Solid 4 website. Here, you'll get training missions, narrated by Otacon. These missions will help you become as stealthy as possible, and participation will earn you DP (used to unlock various downloadables). Beat all the training missions to unlock the full site, which features some truly fun diversions.

[Thanks, Dahk!]