wortex says:
Checkpoint Package\Checkpoint Bomb:
The map should be centered around a 3x3 area that contains as many checkpoints as possible. The player gets anywhere between 0-27 (though 27 is pretty impossible) additional points (1 for every checkpoint in the "cube"), the checkpoints however cannot be stringed together (i.e. you can't put two checkpoints in a row if the car is supposed to drive through them one after the other). Additonal checkpoints can be put elsewhere to prevent cutting. "Theme" scoring should judge how creatively the checkpoints are placed within the area. (if a cp is 2 blocks high, it's fine to put it on the highest layer, effectively making it a 3x3x4 but the base of it is still in 3x3x3)
This is just a rough concept, and probably a terrible idea, at least in its current state, but with some polishing it might be cool.
I like this idea (and actually made something similar a couple of years ago). If we were to try this, I'd suggest:
1) Don't allow item-CPs, only block CPs (or else someone will just jam 8000 item CPs in there).
2) Do allow block-mixing (with points off for ugly z-fighting or whatever).
3) Maybe go a bit larger? 3x3 is really tough, especially on vertical even if you only force bases. Maybe 4x4...? Edit: Or maybe not...might as well make it a challenge?