I think DL still has a few, maybe Swiss, and Thai.
Its a damned good cargo plane though.
But isn't it tricky to load them due to the tail engine and its effects on the center of gravity? The 747-400F and 777-200LRF has the center of gravity located between the wings.
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