Following the success (at least in Japan) of Jubeat Plus, Konami is porting another of their arcade rhythm games by the name of "Reflec Beat" to the App Store. It seems to be like air hockey with tapping controls and dozens of pucks, but the end result is similar to other rhythm games on the App Store. However, with it's current design, multiplayer seems very likely. Here's a video from TGS 2011 of Reflec Beat Plus on the iPad.
I have this from the Jap store. It is really good thou on medium, it is already tough as hell. Cant wait till they get it over in the US store. They will probably have gaga song packs again like they did for jubeat, nope...jukebeat.