i do have lots of cork left over. DIY Cork Memo Board: Inexpensive cork transform into a contemporary office bulletin board. Candy-color pushpins organize invitations, hold business cards, and show off interesting ephemera. (Go to bhg for the how-to.
This is more just an idea for something you guys can keep your eyes out for at garage sales (old pie tins). I would really like to have a wall like this (old pie tins as frames) but have yet to run into any tins.