DL as in Delta? They pulled theirs in early 2003 or 2004, I remember seeing pictures of the last one (still wearing the old black-and-white "widget" paint, oddly enough) arriving at Atlanta from Narita to a full water-cannon salute. They're now using their 777-200s on the ATL-NRT route.
A couple of the ex-Delta planes are now flying for World, I think the rest are in storage.
}:-)4
Wasn't sure how long they were keeping them, I thought they still had a few leased.
I forgot about World, very strange airline indeed. About 10 years ago they had something of a schedule, and I was able to fly them for nearly free, but I never could find a reservation center, or get through. Odd flights, like Orlando-Brussels, or Belfast to Baltimore.
They just bought out North American and they do well on military charters, as does ATA in their 5 L1011's.