I had this idea once to exchange postcards with people if they emailed me their addresses, but only four people ever responded, and I chickened out on sending postcards to most of them because I couldn't make nice enough postcards. Also, everybody in Ku House lost their jobs right about then, so... you know, distractions.
I just found this today. :D
I think I'll be able to do it this time, without the pressure of knowing who I'm sending to... also, there are a ton more decent postcards available in Arizona than I ever found in Missouri.