Just wondering..
It is possibly the best underrated game ever for the DS, for those who haven't heard of it - you play as a group of "agents" who have to save the world through the power of music. It's a rhythm action game a bit like guitar hero so you whack circles on the touch pad in time to the music.
As far as i know the (insert expletive)'s only released it in the US and Japan, as obviously we Europeans are too clever to appreciate it.
The genius is partly the fact that the songs are all well known (but covered), things like "YMCA", "The Anthem", "Material Girl" and stuff from Jamiroquai and The Rolling Stones as well. I've played it solidly for the past month or so and it's still going strong (i've beaten the last difficulty, so it's more playing with mates and getting high scores now).
I would seriously recommend this to anyone who's either going to the 'States or would consider importing/buying from eBay..
Coupla vids:
Last Level Uber Difficulty [spoilers - just stop the vid after the song ends if you don't want to see the cutscene]: http://youtube.com/watch?v=tao7bqOxe0M
An more mundane level: http://youtube.com/watch?v=K7Ys2qFinXc
(those are on very hard difficulty, it is a lot easier at lower levels )