Wow...
Count this as a review for both one and two, I just played through them both. They both scared the hell out of me, and both are definatly some of the most impressive games I have ever played.
The story line is very good, and keeps you interested, even when reading a 30 page diary. It's like reading a future history of the world, albeit a dark one.
Please, don't let the story end here. Let there be a third game with a third protagonist! Let there be more!