It looks lovely, and it's something I'd very much like to learn some day but I can't for the life of me think of what I would use it for. Are there any killer apps out there for it?
At least with lisp, I can configure emacs ...
You could start your own project. You could contribute to an existing project. You could evangelize Haskell at your job, if possible.
All of these are hard, of course. It'll be easier to use a more mainstream language. But if Haskell strikes your fancy, maybe it's worth the effort?
Yep. Sure. Just as soon as I get done shaving this Yak ;-)