It's a small thing but a really cool thing to include in a game. Nintendo needs to encourage more of this from their developers, these kind of niche things expands the market. All they'd have to do then is improve their promotions so we don't end up with another Corruption fiasco. This online promotion here for a FREE wii, this is something Nintendo should do more often and for individual games to generate buzz.

http://www.gamesncs.com/rd_p?p=192108&t=9528&a=13190-wii&gift=3679