One day after Amazon wowed the tech world with its Kindle Fire, pundits are giving the new Silk browser a close look. As posterous’s Chris Espinosa explains here, Fire pre-caches Web content on Amazon servers to deliver a simple, lightweight stream to devices. That isn’t all that new — Skyfire, among others, has been doing this kind of thing for a while, as Om noted — but the difference here is in Amazon’s massive server farm. Amazon will have access to every piece of data coming through the browser, from user behavior to ads to the content itself. That is already raising privacy concerns, but it also is a shot across the bow of Google. As Espinosa writes, “This is the first shot in the new war for replacing the Internet with a privatized merchant data-aggregation network.”