I'm sure there is no way to fix this but WW really uses quite a bit of CPU power to do its thing. I have a 1.67ghz powerbook and it maxes it out. Even in the demo mode in the beginning opening screen. just a concern from a battery starved Pbook user.
. . . and also here with a 1.5 GHz PowerBook.
The fan starts up pretty quickly too.
Only playing the demo at the moment - planning on getting the full shebang pretty soon. This game is a wonderful waste of a short time!