I can't wait for MGS4 to come out...the story is so golden in this series. Some of the characters depicted in the teaser poster Psyke posted seem a little familiar.

My guesses (from left to right):
1. Seems to look like Vamp...
2. I think that looks like Meryl
3. No idea
4. Ocelot
5. Snake
6. Otacon
7 & 8: No idea at all. But #7 has the patch on his eye...

Damn, I'm so excited for MGS4. I can't wait to see more info on this.