Well, if you preordered Metal Gear Solid 4 you should have gotten the Beta Code for MGO, but more importantly the preorder bonus Disc Metal Gear Saga Vol. 2. It's all about the Snake's: Big Boss, Solid, Liquid and Solidus. It's good stuff. Plus, there's a sweet timeline at the end starting from 193X when the last Philosopher dies to the start of MGS4. My favorite event in there:
1961: Pres. Kennedy falls into disfavor with the Patriots.
Also, Gamestop is taking preorders on the Limited edition of MGS4, with 2 documentaries, an artbook and some other goodies.
I'm sooo excited!
Good Stuff