My friend Amy, who I met during my time in Vermont College's MFA program, runs this great site of collaborative work between writers and visual artists (and sometimes musicians too)! It's organized in rounds and each round runs for a specific period. How it works is I'm assigned a partner, I send him or her my poem, he or she sends me a visual art piece, and we each work on a response piece to the other's work. At the end of the round, all pieces are submitted to Amy, and she posts them on the site.
This time I was assigned a mixed media artist to whom I sent my poem "The Looking Glass"--you can view it with her response piece. Check out the SPARK website to see more creative, collaborative work!