I recently came across this visual exploration of wabi sabi http://journals.concrete.org.au/nat/archives/2008/07/wabi-sabi.php
You might need to copy and paste the URL in order to access the page, but I'll put it in the Links page as well......
"Wabi sabi describes a traditional Japanese aesthetic sensibility based on an appreciation of the transient beauty of the physical world.It embodies the melancholic appeal of the impermanence of all things. With its focus on the delicate subtleties, objects, effects and environments of the natural world, wabi sabi promotes an alternative approach to the appreciation of both beauty and life itself." Andrew Juniper, 2003