Thanks!
We did the Kitchen Sink about 10 years ago, with a family of five and drained the bowl (we had 3 teenagers with us)!
MMmm.. maybe we'll have to rethink this with just the two of us...
Their official list is "all the toppings in the house" which would be marshmallow, strawberry, pineapple, peanut butter, hot fudge, butterscotch, almonds, and maraschino cherries. But I don't know if they really mean all the toppings in the house.
It's sold at Beaches and Cream, a no-reservations TS restaurant at the Beach Club.