Okay, I think this can work. This doesn't have to be a big thing; certainly nothing like the scale of the Christmas one.
What I think I'll do is get the people who are interested to send me both their addresses - snail mail and email. I will then send everyone a list of the email addresses and each person will get one randomly chosen snail mail address. Speaking for myself, I know I always have one or two left over cards and it is WAY easier and cheaper to send just one!!!! You don't have to send a real card but if you choose to, then you only have one person to send it to.
What do you think????