Welcome to the new and improved Proflex / K2 Tech Forum!
The design is very dated though and is found in dime stores here. Santa Cruz's Superlite is the best of them, but not their mainstay.
Just read a magazine review of the new 2007 Superlight that said it rode as well as (and maybe even better than!) the Blur. Hard to deny the simplicity of a single pivot with the newer shocks!