Markets are popping up everywhere. There's always InTrade, for those too scared of Wall Street to stand in the direct line of fire. Now there's fantasySCOTUS.net, a fantasy league for U.S. Supreme Court cases. Here's the deal: "Cert is granted. You listen to the arguments. You read the briefs. You predict the outcome. Compete for the win!"

The league went live yesterday, and founder Josh Blackman, a freshly minted George Mason law school grad, says 700 fellow law wonks have already signed up. More from the WSJ's Ashby Jones.