I didn't realise that.
From the website it appears you can download new songs to play, thats what I think Guitar Hero should be able to do. I mean you can hook the Wii up to the net so I don't see why not, also they released the game with the capabilities to play as a coop but you couldn't get another guitar until February of this year, when I had a look on play.com they wanted about £70 for it, its cheaper to by the game then you have a spare copy.
QUOTE
US, January 31, 2008 - In a third-quarter conference call today, Electronic Arts CEO John Riccitiello confirmed that a Wii version of Rock band is forthcoming.
Riccitiello mentioned the game at the end of the call's question-and-answer session. There was no release date given, but Riccitiello referred to the "coming launch" of a Wii version of the game.
There's been speculation about a Wii installment of Rock Band's since the game was announced. In April 2007, Harmonix CEO Alex Rigopulos said a Wii-specific version of the title would be coming out in the future.
"We will, at some time, bring Rock Band to every [important]platform," Rigopulos said at the time, adding that Harmonix would optimize future versions of Rock Band to fit the strengths of the platform. "I think the Wiimote is something that holds enormous promise."
Despite Rigopulos' strong statements, no official announcement had been made about a Wii version of Rock Band until Riccitiello's off-hand statement in today's conference call.