Would you like to reserve extra capacity but not pay for duplicate hardware?  Amazon might have the answer.  In yet another smart pricing move, Amazon has introduced "Reserved Instances" which allows companies to reserve capacity by paying a one time fee.   Companies will then pay usage charges only when they are using the reserved capacity.   Amazon, of course, is hedging that all their customers will not need the extra capacity at the same time.   Reserved Instances is available in 1 and 3 year terms.