Even though it's based on Hex, I'd still say Blockbusters is still pretty damn clever, esp. since it's pretty much impossible for a game to end in a tie.
Cram...the premise was interesting, and I liked the idea of testing the contestants while they did ridiculous things...it's seems like there's some kind of psycho(logical) element, and not just slapstick.
As much as I hated the show, I still nominate Friend or Foe, just for incorporating the Prisoner Dilemma into a game show. I would've loved to use that show as an example in sociology or poli sci classes.