MoneyDashboard.com - links directly to my credit cards and bank accounts. I hear that the US equivalent is mint.com

A couple of points:

1. You don't agree to "buy it today", you "agree to buy" it today. Both exchange of payments and assets take place in the future

2. The price of a future isn't determined by prediction any more than the asset is. The price of a future is given explicitly by the price of the underlying, suitably adjusted for cost of carry and cost of financing

How much appetite would there be for shorter windows on the Open Threads? Having one every 4 days would have some advantages:

• The material would be spread out more evenly through time, rather than having the majority of the posts in the first few days of a new thread
  • The start day would vary over time

Reminds me of this: http://math.stackexchange.com/questions/71874/can-i-use-my-powers-for-good