Behold the FURminator. This thing actually works. I just removed enough fur from one of my cats to build two or three additional varmints. And Cleo loves it! She stood there making little happy noises as I removed more fur in less time than I would have thought was possible short of shaving her. The same cannot be said of the previous brush (and I have the scars to prove it).
It comes in multiple sizes so dog owners can acquire one scaled appropriately up. I got mine from the Cat Faeries but shop around -- lots of places are selling it, including local veterinarians (which is how I first heard about it). You might be able to find a better price than I did.
Am I the only person who wonders how cats can shed constantly but never go bald?