I saw today that AmericanGreetings.com is making all of their ecards and printable greeting cards free thru May 17. They just redesigned their site and are doing this free promotion to let people try out the site. Usually they have you sign up for a 30 day free trial, but for this you can just go on the site, send as many ecards as you want and be done with no obligation.

Free ecards of fantasy art, plus posters, funny pictures and more.

Enormous Categories to send free Greetings. There are over 10,000 Cards Available and huge collection of Desktop Wallpapers to animate your desktop.