Got this in the mail. I was surprised because Choice hotels isn't listed as a partner on nwa.com and NWA isn't listed as a partner at choicehotels.com:

"From Feb. 1 to April 30, 2002, NWA WP members will earn triple miles (750 miles) when staying at any Choice hotel in the U.S. and Caribbean."

Call 800.4CHOICE or visit www.choicehotels.com

No codes. Just present NWA WP card at check-in.