Nodame Cantabile on DS was an Ouendan-alike in which you conducted classical music by tapping the screen. The Wii version, called Nodame Cantabile: Dream Orchestra seems to expand on that premise by allowing players to not only conduct, but play multiple instruments as well.
We can't exactly tell how the Wii version works-- whether you point at the little note icons before pressing a button, or if the game takes button presses only, but Bandai Namco promises a simple control scheme in the interest of attracting new gamers. We'd kind of like to swing the Wiimote like a baton, but we aren't sure if that'll happen.
Of particular interest to us is the four-player mode, in which each player can use a different instrument and play one of the game's 50+ compositions together. We call triangle!