Everytime I hear another snippet about this game my expectations rise one notch higher. I'm already saving up for a Radeon so I can get all those lovely effects, I'm setting money aside to preorder the game when the time comes and I've shown the 25 min movie to all my friends who (to my pleasant surprise) share my excitement.
As an actor/writer/director, I *love* the idea of the NPCs improvising with the player. The potential for interactive story-telling is stunning, and I can't wait to see some RPGs made with the Source engine (I think Epic may have chosen the wrong engine for DX2, but I'll buy it anyway)
Gabe mentioned that they're working with a few selet mod teams prior to release. The table is open for bets on which mods these are (CS2, TF2, DoD2...)
My one fear is that HL2 may turn out to only be a great game, instead of the greatest.