Hidden at the end of a press release for Microsoft's impressive holiday line-up is word that there'll be news on the GTA IV DLC this autumn. That's 'news' and not a release date.
Whether that means we can expect a release around then or later in the year (dare we mention '09?) we still don't know.
Microsoft says: "In autumn there will be news from Liberty City; the first episodes of GTA IV will be available for download exclusively on Xbox Live, underlining Xbox 360's leadership role in the field of digital entertainment."
Make of that what you will.