To be honest, Nintendo loses momentum everytime they make the slightest announcement.
Everyone is going through the shock, espeically after spending months guessing the price and launch date. I'm sure that the more they talk about Wii, show off the games and such they will likely stop caring and talk about how great the system is.
Also, if naming the console Wii did not kill the hype, which everyone and their grandmother said it would, I doubt the price of the console and the Wii sports pack in will.