I'm playing Portable Ops right now. It takes some getting used to the PSP controls, and the fact that you can only hold four items is kind of weak, but it's pretty solid nonetheless. (Pardon the pun)
And I looked ahead in the script.
Apparently, Big Boss was supplying information to none other than our good friend Ocelot. The last couple lines of MPO, Ocelot mentions how he and Big Boss intend to become Patriots. Can't wait to see how they tie that to the beginning of Outer Heaven.
It's funny how far this series went. At first, it was a shooter/pseudo-stealth game, with cheesy terms and references. (Like anything in the '80s) Now, it's turned into a series that thinks it's a movie, with very heavy philosophical and political overtones.
EDIT: OOH! According to Wikipedia, Richard Steven Horvitz is going to be doing a character in MGS4! That's awesome!
I'll bet it's Johnny Sasaki.