Why do you say that parimutuel betting is the worst form? What is the dimension along which it is bad?
Consider that a rhetorical flourish rather than an academic fact.
In blackjack, sports betting, roulette, and slots, you only face uncertainty in the outcome of the event. In parimutuel betting you face uncertainty in the outcome of the event, and also due to the movement of the odds based on the opinions of others after your bet is placed. Lotteries also exhibit this since a greater number of lottery players increases the size of the lottery, but also increases the probability that multiple people will select the same set of numbers. Poker probably has som...
I'd like to become better calibrated via PredictionBook and other tools, but coming up with well-specified predictions can be very time-consuming. It's handy to be provided with a stock of specific claims to make predictions (or post-dictions) about, as with CFAR's Credence Game.
Therefore, I asked Jake Miller and Gwern put together a list of prediction sources. Feel free to suggest others!
Prediction Sites