There have been 6 third party games on the Wii so far to reach a million. It's pretty much a given that we'll see at least as many this year. There are at least 3-4 pretty certain ones in this thread, and undoubtedly many we haven't heard of yet. The Wii will probably have a lot of surprisingly well selling games come out of nowhere, due to the unpredictable user base and short development times.