My homeboy, Jonny Hinds, is tearing it up with kettlebells and plyos in his favorite style of training, Prison Workouts.
Check it out and test drive it yourself. I have done this while jumping on two tires rather than plyo boxes.
Our Football players have also followed this kettlebell / jump prison workout and it is awesome for strength and power endurance!
P.S. - Gotta love the endless variations you can use with Kettlebells! Check em out HERE.