I did not see this posted on this board, so I will add this that I noticed in my last United statement.

Purchase and fly a qualifying roundtrip between Chicago, Denver or Hawaii and Los Angeles or San Francisco. You'll earn double flight miles in United First or United Business. Travel must be completed by July 31, 2000. This offer is valid only on paid, published fares in F, C or D classes and is limited to three bonuses per member. Other restrictions may apply. To register for this offer, visit http://offers.mileageplus.com/MPN620 To book your flight, please call Premier Reservations at 1-800-XXX-XXxX. (MPN620)