There is a good post over at ZDNet about the Long Tail we've been hearing about the last few years. Definitely worth a read especially if new to the term.
"Commentary--The "Long Tail" moniker has been used extensively (some would say overused) in marketing and mass media over the last couple years. Now, as different use cases for SOA evolve, the metaphor seems appropriate to explain the growing use of services outside of the core domains of SOA, business process implementation and integration. First, let’s take a step back. The term “long tail,” coined....."