So GTA IV's DLC will be out in the "Fall"? Awfully vague, Microsoft. There's three months in the Fall. We like things a little firmer. Like this claim by RPG-TV - based off an Xbox press event held in London - that GTA IV's DLC will be out in November. And when it is out in November, it'll add "roughly 15 hours of additional play time". If true, 15 hours is a looooong time. Too long for it to just be new missions on the same islands. Preview of New XBox Experience [RPG-TV]
I'm a little past halfway through the game so far, and still enjoying it, even if certain parts of the game do grate (no matter how much they've improved the gunplay, once you're not hiding behind something it's still a clumsy mess... And please, please, no more freakin' chase missions: Their "challenge" comes from remembering which arbitrary obstacles the game's gonna toss your way).
The game's freakin' huge as it is. I'm not sure if I'd even WANT fifteen more hours of it. I definitely don't have the time for it, having a buncha other games to play once I've completed the game.