Actually, something bugs me about the Rockstar Duffel bag that comes with the Limited Edition GTA IV.
We all know what duffel bags are used for in the mobster/gangster movies and games: concealing weapons, guns, explosives or money. So I can see this causing a real shitstorm when Rockstar not only gives you the opportunity to play out your weapon-concealing fantasies in a game, but now goes one step further and gives you a tool to conceal weapons in real life.
Of course, this is all assuming that it's a full-sized duffel that comes for the extra $10 bucks. I'm thinking it's going to be a miniature prop like most Limited Edition swag. ...Which makes this rant moot.