A lot of people are commenting on this Daily Grind Iron Man Challenge. The challenge is, a bundle of web comic artists put USD20 in the pot, then they have to update five days a week no matter what, and winner takes all. Controversy has been sparked but I haven't really been following it, so I won't comment.
I'd suggest a different idea. Each web comic artist takes USD20 and keeps it on their person at all times. Then they go and try to find each other in real life, and kill each other. If you kill another web comic artist, you take their twenty (or twenties) and put it with yours. The game goes until there's only one left alive, and that person will have all the money of course.
Or you could kind of "fake-kill" each other, I dunno. Water pistols. Still interesting.