No matter what your opinion on DLC for music games in the form of songs is, I think it is agreeable that it is not very acceptable for this title to not have at least online play. Online play could have been easily done for this title as even Guitar Hero III on the Wii has the feature. I believe that EA, MTV, and Harmonix will probably wait until a sequel to Rock Band to bring online for Rock Band to Wii because of the fact that not even online play is built-in for the title - unless for some reason Nintendo decides to finally put out a HDD, allowing for this feature to be added, but that is very doubtful.
3