From Citizens Against Government Waste:
The 2007 Government Pig Book
http://www.cagw.org/site/PageServer?pagename=reports_pigbook2007
The Congressional Pig Book is CAGW's annual compilation of the pork-barrel projects in the federal budget.
The 2007 Pig Book identified 2,658 projects at a cost of $13.2 billion in the Defense and Homeland Security Appropriations Acts for fiscal 2007. Only two of the 11 appropriations bills were enacted by Congress and the remaining nine were subject to a moratorium on earmarks.
A "pork" project is a line-item in an appropriations bill that designates tax dollars for a specific purpose in circumvention of established budgetary procedures. To qualify as pork, a project must meet one of seven criteria that were developed in 1991 by CAGW and the Congressional Porkbusters Coalition.