I just read this on the Continenal Air website...another program where miles can expire!
Inactive Membership
If no mileage is deposited in your account for 18 consecutive months, commencing after June 1, 2001, your membership will be cancelled, and your miles may be forfeited. To keep your account active, you can earn mileage with a variety of airline, non-travel and shopping partners. Please visit the Earn Miles section of this site for a full list of earnings partners.
