Hi,
Did anybody ever try to use this GarageGames Torque GameBuilder?http://www.garagegames.com/products/torque/twii/ They've annouced the release of a Version that makes Programming of Wii-Apps possible. But to buy it there you have to be a company etc.
Perhaps with today's homebrew activities i think it should be possible to use torque without nintendo. But at first we need to get the Wii-Software-Package.