All items on Koyono.com are 30% off ! Some items are already discounted before using the code e.g the Black/Tan which comes up to $36 with Postage !
Slimmy wallets are not on sale that often so it's a good idea to get a replacement if you needed one (I had mine for 1.5 years and still going strong).
The code BLACK30 Can be used for Crumpler bags which is a bargain if you wanted one :)
http://www.koyono.com/Free-Agent-Travel-Bags-and-Laptop-Case...
Happy bargain hunting !