CIPS ISP holders can receive the NPA CNP through a reduced process and at a special reduced fee. This program was approved by CIPS back in 2007 and is being extended to CIPS members from the NPA for 2010.
 
If you hold a current ISP certification from CIPS, all testing, experience, and education requirements are considered to have been met, however documented proof must be provided of a solid competency in networking.
 
http://www.cnp.org/incentives.html
http://www.cnp.org/2010_CIPS_ISP_Incentive_Form.pdf