The blog post actually is actually older than 4E so it might have been early musing about the 4E.
Personally, I see this system being more closely related to 2E NWPs than the 4E skill system.
While doing some searches on a skill hack for an upcoming game, I accidently stumbled across this old blog post and thought people might find it interesting.
mearls: A Simple D&D Stunt and Skill System
Magg