"There's a bit of a design, creative learning curve on how to fully exploit the nunchuks and Sega is already thinking about its second generation software. So if they're not already here, they probably weren't on board at the beginning and the companies are going to have a harder time thinking about ways to innovate and Sega's already thinking second generation."
Sega's quite a supporter of the Wii, but Scott does comment that he hasn't seen a metric ton of Wii games in development from third parties, contrary to the raving Nintendo fanboys. Hopefully, games like Banana Blitz and Wildfire can create a large enough install base to make those third-party games worthwhile for developers. More delicious interview in the link.