Provider/NAP filtering policies

Greetings. I was hoping someone could point me in the direction of provider/NAP prefix filtering policies. Most important to me is UU and Cogent, but a concise listing of notables would be much appreciated. Regards, Jade Jade E. Deane Senior Network Engineer SunGard Futures Systems SunGard Systems International, Inc. jdeane@sungardfutures.com +1 (312) 577-6100 ext. 6961 +1 (866) 741-0076 (Fax)