HA ha, no I'm getting it from my crazy Canadian currency rate, sorry about that!  $30 USD is what I was thinking, and I still feel that's a bit expensive for some of the game concepts we've seen.  Pac Pix looks nifty, but it sounds like little more than a mini-game.  Of course, I should just shut my trap, since I haven't played it.
My point was, what kind of game concepts will hold up for 10 hours or longer using the touch screen?  I don't know the answer yet, but that's what's exciting about the DS: hopefully it's going to take gaming in a new direction, the way many Nintendo products before it have.