Has anyone gotten to try out Professor Layton? From what I've heard, it sounds more like a collection of riddles and puzzles than a real adventure game. Then again, it's a fine line
Also, I know many adventure gamers aren't into this type of thing, but the new Zelda for DS is out, and it'd very good. The stylus-based controls give it a much more "adventurey" feel than most Zelda games, although it's still clearly action-based.