Not of fan of the Wii. I feel they need a new system already to get it right. They're going to release Motion Plus which is what the system should have shipped with day one.
I'm not going to go into further reasons why, but just looking at a majority of whats available on Wii and how they use the features of the system, it's clear that Wii is a half-step to where it should be.
Just my opinion though, so don't jump me please