Nintendo Wii will not cost more than 25,000 Japanese Yen said Nintendo's senior managing director, Yoshihiro Mori. Converted using xe.com I was able to find out that this will roughly be $220. This does not seem like that spectacular of a price point so most likely I suspect it to be at $200. If the Nintendo Wii is really this expensive than expect them to sell a ton of Wii's and expect to sell even more games.
Think of it this way. If the console and one controller costs $200 then you could probably buy an extra controller and one extra game for $100 more. Sounds like a pretty good deal for $300. The lines will be long on launch day and I can't wait.