The key is a forthcoming "Speaker Channel" for Wii which, while not officially dated, would seem to be a shoe-in for day-and-date launch with Band Bros. DX in Japan. For those unfamiliar with the game, it allows up to eight players on individual DS systems to pick an instrument and "play" the included songs, or jam out and create their own. The original Band Bros. was -- at one time -- due for release in the US as Jam with the Band! but has vanished from the radar. Hopefully this sequel will survive the trip Stateside; stores would likely be alive with the sound of ringing registers for this Wii and DS duet's debut.
[Via Wii Fanboy]