Wired editor Chris Anderson’s “Pre-filters” vs. “Post-filters” discusses how a long-tail market relies on a different set of filters: advisors instead of gatekeepers. With cheap and plentiful distribution, shelf-space is no longer at a premium. That means that instead of editors, A&R men, Hollywood studio execs, and the like deciding what reaches the masses, post-filters like Google, MP3 blogs, and Amazon’s customer recommendations take the helm. Anderson says, “…the day when people like me decide what makes it to market and what doesn’t is fading. Soon everything will make it to market and the real opportunity will be in sorting it all out.”