I don't own a Kindle and don't foresee owning one in the near future. However, the notion that an e-book should be priced anywhere close to a dead-tree version is ridiculous. The publisher's production and distribution costs for an e-book are virtually zero. Yes, the publisher needs to recoup marketing costs and pay the editor's salary, and of course the author needs to be paid, but most authors only make about 15% of the hardcover list price, and most titles get almost no marketing support from their publishers. If a publisher can turn a profit on a $25 hardcover that it wholesales for $12.50, and $3.75 of that goes to the author, how much of the remaining $8.75 goes for printing, binding, warehousing, and shipping? My guess is, at least half. That means currently, publishers feel they can earn back their marketing and editing costs and make a profit if they take $4.50 from each sale. $4.50 (publisher) + $3.75 (author) = $8.25. Amazon sells at $10, that's $1.75 profit for Amazon for something that costs them very little to store and distribute, not counting the profit they make off of each Kindle sold.
Publishers need to either spurn e-books entirely or price them rationally, and if the latter, people will either pay a premium for dead trees, or buy Kindles.