Recieved this very rapid response from United today regarding my concerns. It may be a template but is still an impressive reply rate.

Dear Mr. Brook:

Thank you for your email expressing concerns about US Air's announced changes affecting their Dividend Miles Program .

As you know, United Airlines, along with the rest of the airline industry, is faced with dramatic changes to our business environment. However, there have been no changes to our Mileage Plus Program affecting the manner in which our customers currently earn their status miles. Your feedback and concerns are appreciated and have been shared with our senior management.

As a 1K member, you are one of our most valuable customers and your continued business is most important to United.

Sincerely,

Charlie Johnson, Customer Relations
United Airlines