From the washingtonpost.com chat:
Thank you Keith and to all listening. Yes, based on feedback from customers, today we have announced two changes to our policies regarding non-refundable fares. You will be pleased to know that we will continue to credit all miles earned toward tier status whether on a full or restricted fares. Second, for travel on or after January 1, 2003, customers will be allowed to standby with a non-refundable ticket with a $100 fee.