The Legend of Zelda: Phantom Hourglass impressions at Nintendo World Report.

"We're all used to moving Link around with a D-Pad or analog stick and attacking with buttons, but the DS game throws that out the window. Everything is controlled on the touch screen via stylus controls: movement, attacks, items, picking up and throwing objects, talking to people, etc. From the looks of it, you don't need to press a single button to beat the game. This is something Zelda series producer Eiji Aonuma has wanted to do for quite some time, and by-George-he's-done-it with Phantom Hourglass."

Full Source: Nintendo World Report