I participated in Kat Sloma's postcard exchange - she ended up with over 250 participants from all over the world! We were each to submit 5 postcards, she'll do the exchange and send each of us postcards from 5 other people as well as one from her! The cool thing is that all kinds of art was welcome, so it will be interesting to see what arrives in my mailbox.
I used my photography and printed 2 different prints - peony and rose for summer. I'll be sure and share photos of the cards I receive in exchange.