The price is exactly what I expected, there was no way it was going to be less than $20 because Nintendo can get away with charging $20.
Micro-evolutions are just something that have been fast becoming the trend with all technology, so it's something I have to learn to accept. It's been a part of computers for over a decade now, with all of the various cards, chips, and accessories you can buy to upgrade your computer. If someone doesn't want to buy those upgrades they can just wait until they're all available in a new model and buy that.
Anyways, I haven't been following up on any of the Wii Motion Plus games so I don't even know what it is capable of. It's something I'd want to try before buying though, so I hope they set up some demo stations of Wii Sports Resort in stores.
I can see there being mark-ups of the accessory and also Wii Sports Resort because of the potentially huge demand for it.