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Since its release in 2007, the last volume of the Harry Potter series, Harry Potter and the Deathly Hallows, has garnered 3,286 reviews from Amazon.com customers. While response has been overwhelmingly positive for the book, several hundred Amazon customers rated the book as mediocre or worse. Because of a very subtle yet clever feature, Amazon makes the best of both the positive and negative reviews easy to find. And that feature, based on our calculations, is responsible for more than $2,700,000,000 of new revenue for Amazon every year. Not bad for what is essentially a simple question: "Was this review helpful to you?"

A new study by Canadian research firm Pollara has surfaced data indicating that Malcolm Gladwell's popular theory about key influencers moving markets may not be valid. Gladwell's arguments in the 2000 book The Tipping Point had reached levels of cliche approaching The Wisdom of Crowds, in large part because of its seductiveness to marketers.

Shayne Tilley is the Marketing Manager for SitePoint and was nice enough to do an interview for JungleJar. We discuss his new book scheduled for release in May of this year, current web browser releases, Twitter, and of course SitePoint.

Learn how to optimize your weblog to rank well in Google and other major search engines.

HP can spam the hell out of Google and Google engineers are afraid to do anything about it because they do not want to lose the associated AdWords ad budget. But if you follow HP's strategy it is called spam - and a Google engineer will smile while killing your site. It's just business.

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