My nephews wife got the information for this site after he left for Iraq last week. I'm not sure who supports the site, but she was given the info by the Military Wives Support Group at Camp Lajuean.
It's pretty neat because the letters are printed out and delivered to troops that don't have access to regular email.

Check it out: http://motomail.us/

 

This is pretty darn neat! We've sent several emails and he has recivied his printed mail within 24 hours or less. This is especially good for the troops at the small camps with no PC's and email.
As those of you that have been there know, these letters mean a lot to a 19 yo Marine that's seeing his first combat. He's been in a pretty safe area so far, but hits the streets next week.