I love sprinting too, and I compete in it on a irregular basis.
Everything by CT is great, 200 or 100 meter interval training and such, but what I love to do are shuffle sprints in sand.
In fact, anything in sand, will make your calves and upper legs so strong you will feel like a feather once you're on the road or the track.
Running in dunes is great for that matter.
I also like sprinting 100 meters, doing 50 pushups, another 100 meters, 20 high-jumps, 100 meters, 50 situps, etc ... I bet you can improvise.
This is clearly for fat loss though, and does not aid performance per se.
For fat loss, you best stay between 200 and 400 meters. Anything below that is less effective if that's your goal.
If you're feeling like a bad ass, you can always do that Cooper test.
Do they still do that in high schools, actually ?