There was a game that came out a year or so ago.. It was like Diablo 2, but different enough that it wasn't overlapping.
I totally forget the name though.. It may have had "Dungeon" in it, but it wasn't Dungeon Siege.
I remember playing a demo of it.. You could use a pack animal to carry extra goods around..
I'm drawing a complete blank though. It may not have had "Dungeon" in the title, but I remember really wanting to play the game, but my PC couldn't really handle it.
EDIT: The game is called Dungeon Siege.
Here is a picture of the box art:
Reviews of the game, can be found
HERE.
Also, it looks like an expansion pack has since been released called, Dungeon Siege: Legends of Aranna.
Take care.
EDIT AGAIN: My bad, looks like this has already been suggested.. I guess I should have read the replies first.