[ecmendenhall]

If you're sufficiently convinced by this, the 538 model, or your favorite electoral vote map, and you are willing to bet your beliefs (and you are in a jurisdiction that has not regulated prediction markets out of existence), Intrade contracts on an Obama victory were trading around $6.70 today.

[usaar333]

This should be legal for any American: http://tippie.uiowa.edu/iem/

Sadly, if you don't already have money there, your transfer is unlikely to go through until after the election.

[icelancer]

It will be impossible to get money on Intrade before the election.