Actually, I just got an ad for microcenter yesterday, and you get the cube, a wireless controller (3rd party, not wavebird), and one of the following games: Star Fox Adventures, Super Mario Sunshine, or Mario Golf: Toadstool Tour for $99. In addition, it works with the bundles (like the Mario Kart: Double Dash one).
Obviously, this is only helpful if you have a microcenter near you (and they are pretty limited), and the one near me tends to never have what I want, so I would advise calling first.