Wabi-Sabi for artist and designers ***author Leonard Koren. If you are really interested in Wabi by his book! Then you will see who everybody on the net is cribbing (only usually not as well)
hashi and hashioki Ultracool page on chopsticks, shows examples of different chopstick designs;including those made by Sen Rikyu. He made fresh chops from new wood before each ceremony so guest could enjoy its aroma
SENGOKU-EXPO MENU It may not look like it from the simple text menu but a great site with lots of interesting pictures and history from the Japanese Warring States Period when the tea ceremony was largely developed