I just had a thought... Why doesn't somebody implement a spreadsheet where Haskell is the formula language? 8-)

I have already been struggling (unsuccessfully) to write a program to graph functions, but why not go the whole hog and make an entire spreadsheet program?

Possibly one of the most depressing things about Haskell is that there isn't one single large application anywhere that you can point to and say "this was made with Haskell". Maybe this could be that app?