The Chicago Tribune has a new, newish, interview with Dan Houser about IV, it's mainly about the script but has some interesting information about some of the discussions going on at the forums.
""The Sopranos" is such a dominant cultural artifact of the last few years that we didn’t want just to be treading in their shadows. We wanted it to be a game that wasn’t—in the way that the first part of "San Andreas" was heavily derived from "Menace II Society" and "Boyz N the Hood" and that media world of early-’90s L.A. And obviously, we went out and did a lot of firsthand research. " - Dan Houser
The interview is divided in four, respectively: Part 1, Part 2, Part 3 and Part 4. Finally, you can discuss it with us over here.
Thanks to Magic_Al for pointing it out!