I had posted some days ago about a research study that questioned the Long Tail theory. Here is more thought on that from Chris Anderson in Wired, who concludes that "It's hard to make money in the Tail. . . . [I]t's also hard to make money if you don't have a Tail (to satisfy minority taste, which improves the consumer experience), but the revenues are disproportionately in the Head."
Thanks to Kevin O'Keefe for the heads up, via Twitter.