I haven't, but I have a friend who mixes Cheez Whiz with canned chili and heats it in the crock pot before serving as a tortilla chip dip -- kind of a miniature nacho deal. She said she has to really watch how much she is consuming because it is so good, it's easy to go overboard.
Another use for Cheez Whiz
http://www.freerepublic.com/focus/f-news/1688906/posts?page=393#393
Or, if you are in the UK, use Cheez Whiz substitute.