Here's a good test...

...of the value of Intrade over opinion polls. (Read my opinion here.)

PPP has Rick Santorum leading Mitt Romney in the Minnesota caucuses tomorrow:

Santorum holds a small edge there with 29% to 27% for Romney, 22% for Gingrich, and 19% for Paul.

Intrade, on the other hand, has Romney's chance of winning at about 72 percent, comfortably ahead of Santorum at 27 percent.