In a former life I worked for Xerox. A friend sent me a note telling me about something the company was doing in a effort to let our troops know that no matter how you feel about it personally, we very much appreciate the fact that they are out there for the rest of us.
The site is called: www.LetsSayThanks.com. It allows you to send a card to a serviceperson. You just fill it out (takes less than a minute) and Xerox will print the card and have it delivered. The cards were designed by kids around the country and are pretty neat.
If you are of a mind, just go to www.LetsSayThanks.com