I agree, I'd like to see it built in to the future wii-motes. After all, when the PS3 finally got the rumble, you don't add it, you just get a new controller. The new controllers should have it the same way. If you want to add it to a 'current' controller, even $20 is quite a bit for something that... rightly or wrongly, we figured would have been there in the first place.