If you think your friend may be in the states, there are a couple sites that may help. If he has a published phone number (www.switchboard.com) and if he has a current US Pilots License (www.landings.com) In landings, scroll down and it has a place to "search databases" then look for US Certificated Pilots. Its not all that accurate but the best without spending money.
Good Luck
[ 01 August 2001: Message edited by: B Sousa ]