Gamespot has an update on interactivity in the game so I would guess IGN does too. Here's some quick notes:
CJ has many different moods that he articulates through over 4,200 comments. This number excludes the over 3,500 scripted comments and lines in the over two hours of motion-captured cut-scenes.
There's fat CJ, pissed-off CJ, wisecracking CJ, and sweet-talking CJ, to name just a few.
After being talked to you can tap left on the D-pad for a negative comment and right for a positive.
You'll find over 300 different kinds of pedestrians in the game, with 60,000 different comments.
Citizens talk to each other about their lives along with taunting and so forth.
