Not too much, really... you can make "fluffernutters" which are just fluff and peanut butter sandwiches on white bread. I ate those as a kid. You can also do some sweet recipes, namely fudge and candies.
I like fluff and celery, I know I am weird.... Fluffernutters are the best though! As a sandwich or a shake! I usually use white chocolate or crunchy peanut butter (from the pb co). I have a "peanut butter company" cookbook too which gives lots of tasty recipes to make things.
I had never heard of a fluffernutter til I met DH - must be an east coast thing. Hubby eats fluff with vanilla wafers too. They're ok like that, but I like them better with a square of Hershey bar (sometimes we freeze them) - kinda like a s'more, except I like vanilla wafers better than graham crackers.