...has been a topic on some poet's blogs recently. Here's a post by Lisa Robertson and here's a response to the post.
On a related note, I received a card from a writer the other day. I read it and pinned it up with the other cards. Today I stared at it until I finally had to take it down to check the back. There I found the artist's website. I visited the site and its gallery of cards. The one I received is among them.