CAGW (Citizens Against Government Waste) have released their 2007 Congressional Pig Book.
From the news release:
The 2007 Pig Book identifies 2,658 pork 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. CAGW has identified $254 billion in pork since 1991.
The complete pork database can be downloaded as an Excel file.
Also, historical trends:
Thanks to my friend and colleague, Shirl Kennedy, for posting this one on DocuTicker.