Here's an interesting idea: start pre-selling an album on-line with an initial price point of, for example, $15, and the more people that order before the release date, the lower the price-point drops (with a floor of, for example, $5). Those who originally ordered with a higher price than the final price point get the benefit of the lower price! (Cliff Richards, UK release of "Love, the Album" on EMI)
Is this Amie Street in reverse? At the very least, it is a good way of measuring what music is actually worth to the consumer. But who will be the first person to order the pre-release without a guarantee that the price will drop? At least with Amie Street, you KNOW the price you are ultimately going to pay, because it is in real time.