Modern Cottage has a great post with instructions for creating numbered cork coasters. You could alternate the numbers for letters or a symbol. The post explains how to create the number stencils for your coaster using freezer paper, varnish, an iron and a sharp xacto knife. If you wanted something instead of numbers you could easily make different stencils using the same instructions. We think using the numbers is best because it makes us think of the awesome Numb3rs tv show. (via Craftzine -> Whip Up)
A post on Vinography points out some interesting cork craft related sites. The Annual Champagne Chair Contest shows a lot of cork seating creations. Click on the small link that says "See all the runners up" to see all 36 entries. In case you are not familiar with this contest these were the rules.