A couple a weeks ago I re-launched http://www.inspirapress.com as a WordPress performance challenge.
The purpose is to create a website from scratch that incorporates all its functionality through carefully chosen plugins without compromising performance or W3C-validation.
The goal is to get top score in tools like GTMetrix, Pingdom, Webpagetest and Google Web page test.
I'm getting there, but I could really use all the help I can get!
So if your a dedicated and skilled WP-developer, join me in this challenge!