Hehe, yeah Joe, it's pretty capable already, but could use some more use in the fuzzing area.
Take a look in the examples directory. There's a Mongrel test suite that uses rspec and rant to fire up a Rails app at ~/projects/testapp and then tries to destroy it and validate certain things. All the tests in that suite came from bugs that were found which I needed fuzzing to prevent in future releases.
Next, take a look at the examples dir for various ways it's used as a client and as a fuzzing lib.
Then, try breaking some stuff and let me know what happens. Tons of fun.