Sarcastic Gamer may be the best gaming site in the world, but I would be remiss not to mention a great 7 page article all about GTAIV with Sam Houser on next generation.
http://www.next-gen.biz/index.php?option=com_content&task=view&id=9570&Itemid=51


Note: This is part 2 in part one they discuss the evolution of the GTA series