Well, everyone already said it. I got certified, but only because my company paid for it (I didn't ask to be certified, they just provide that). I didn't even take a class or read a book. I just know the program inside and out. I haven't gotten any phone calls from any new clients saying "I heard you were certified." It's bragging rights (if even that) and doesn't mean squat. Focus on the art of editing and technique. Certification in knowing what button to push isn't going to get anyone very far. The only people it will impress are those who aren't in the industry and pretend to be or those who don't know any better.
EDIT: Oh, and I did get a very nice Print Shop created certificate and my name in the Certified Pros page.