Granddaddies of the genre itself, Konami is set to bring a new and original rhythm game to the DS, titled Utacchi. The name is a mashup of the Japanese word for song, "uta," and the distinctly less Japanese word for touch, "touch."
Despite having its own product page, very little is known about the game thus far, as few details are given in its description beyond noting that it's played by touching things in synch with music.
However, drawing conclusions based on absolutely nothing but the logo image above, I am going to guess that this is a game in which an evil, sparkling squid monster with the head of a frog is eating people's hearts, and you must use the power of music to put a stop to his reign of terror. And if turns out that it's not, then I'm off to file a copyright, because that sounds awesome.