The subtitle for Taiko no Tatsujin DS is 7-tsu no Shima no Daibouken (Great Adventure of the Seven Islands) and Namco Bandai is adding sound effects for at least seven extra instruments. Players can choose their instrument by selecting “option” from the song list menu and tapping on the taiko drum sitting on Wada-don’s dresser.
Besides the effective screen tapping area I don’t think playing with a tambourine will alter gameplay much. However, this is a neat first for the Taiko no Tatsujin series. The touch screen drum allowed Namco Bandai to experiment with other forms of percussion. We'll see how this works out and if Namco Bandai has any other surprises when Taiko no Tatsujin DS is 7-tsu no Shima no Daibouken comes out on April 24