In the most recent issue of Game Developer, they did a post-mortem on Downhill Jam. He had a lot of prise for the Wii, and unlike some games they did for the Gamecube none of the problems were technical, but time and "legal" related. (They wanted an E10 rating, trouble with liscened music and the art overloaded their art team. (They had 18 level artists, 6 programmers, 5 animators, 11 designers, 8 testers and 1 concept artist) And still they had problems with getting what they want in art in.)
But there was one teaser that caught my eye when they were talking about their brain storming for the game they said that some of the best ideas didn't even get put into the game. (They said something about a chainsaw) and they will be using them in the next game. So it looks like one developer is really happy with making "new" content for the Wii and expects to do it again.