For those who don't know, Orange Box is a compilation of Valve games including:
Half Life 2,
Half Life 2 Episode 1
Half Life 2 Episode 2 (new)
Portal (new)
Team Fortress 2 (new...finally out!!!!)
+ the standard Source Engine Mods:
Counter Strike:Source
I actually pre-ordered it just to be in the Team Fortress 2 Beta and I've been very pleased with what they have done to the game for the most part.
Good:
Has the same feel as the original with better game balancing and simplification/specialization of the various classes.
Bad:
For some reason, they totally got rid of grenades (probably to prevent grenade spamming) and the game doesn't add much new content/variety to the old general formula (but it does leave a lot of room for improvement and expansion).
Ugly:
There's a new feature where if you get repeatedly killed by the same player he becomes your nemesis. The next time you kill him, the trumpets will blare in an old batman tune emphasizing that you got "revenge" with a zoomed in screencap of you smiling over said dead nemesis
. 
