My group ran "Pizza Night" this week, with slight tweaks to fit our campaign setting, and they loved it.
I stated the fairies with Inhuman Speed, Diminutive Size, and +4 Athletics and Fists, but then I gave them one stress box each (and DS gave them one damage). So they were hard as hell to hit and dodge, but they didn't hit very hard and getting hit once took them out. They loved the new dynamic of that, too. I made four of them, different colors, (and named them Inky, Blinky, Pinky and Clyde), and they'd ended up trapping one and taking another out before forcing the other two to talk, eventually spilling the beans on why they were there and who sent them. Our players ended up putting a glamour over themselves to look like Oberon and Titania, plus an Ogre and two Elf archers, to scare the piss out of the otherwise-mortal pizza owner who hired the pixies.
Oh, and it was a bunch of fun role-playing the pixies, too. "Brothers! Attack the swordy one!" "Sisters, the pretty one speaks of pizzas!" "The old one has a table! Look out, cousins!"
I heartily recommend it. We're going to try the auction one soon. I'm not terribly impressed with the other two ideas, personally, though I might do up a version of Ghosts in the Shell somewhere down the line.
