Konami is turning the release of Metal Gear Solid 4 into a huge event, with so many collaborative marketing schemes that you may think you're waiting for a movie release.
Like the Assassin's Creed promotion, most of the collaborations involve real world items making the trip into the game. Of particular note is the in-game iPod. Using this, you'll be able to change the game's background music to music data that you find in the game world. You'll also be able to download new tracks via the web.
Other real world items set to appear in the game include Regain energy drinks, the Sony Ericsson W62S cell phone, and Triumph Motorcycles. Triumph is represented through two of its bikes: the Bonneville T100 and the Speed Triple. The cell phone is used by two in-game characters, Vamp and Naomi. Regain is represented as an in-game energy drink. But it's also taking something back from the tie-in, as, leading up to the game's 6/12 release, some convenience stores will stock special bottles that include a cell phone screen cleaning pad or a dog tag.