I seriously doubt WotC would -want- their products voted on (notice how they don't have visible polls?). While they do have many nice products, they also have products that outright tick people off on a regular basis (Complete Divine has TERRIBLE editing, even by WotC standards, from what I've seen, and The Planar Handbook is full of video-game style powerups and "The Lady's Stats" (TM) which is just adding insult to injury on how the Planes are treated in 3e. WotC prefers no reviews to bad reviews (Look what they've done with the novel topics, even).