The+Long+Tail

You need look no further than Chris Anderson's extensive blog on the Long Tail phenomenon: [|http://www.longtail.com]
 * Chris Anderson's Long Tail**

Also of use is the Wikipedia reference to the Long Tail, which draws upon some economic precendents: http://en.wikipedia.org/wiki/Chris_Anderson_%28The_Long_Tail%29
 * Wikipedia's Long Tail**

If you're brave, you can read my overview presentation with extensions and ramifications for school environments:
 * My Presentation**