Since United is joined at the hip with Marriott now I thought I'd post this for those interested.
United is again giving away credit for 10 million miles in its frequent flyer program to various charities, with the amount each gets depending on how many votes it receives between now and Dec. 31. You do not need to be a United Mileage Plus member to participate, and can vote as often once each day.
Several charities dear to the hearts of military-related folks are on the list -- the Wounded Warrior Project and Fisher House -- although there are many other worthwhile ones there.
See the list, and the full rules, at http://www.10millioncharitymiles.com/ and vote up to once daily between now and Dec. 31!