Interesting, that happened with Chibi Robo DS too - it was exclusive to Wal-Mart in the US but available everywhere in Canada.
I've been playing Anno 1701 for a while now, and it's a great little game. I end up losing track of time while playing it and then before I know it, hours have passed. I find the touch screen controls and menus are really well implemented too - one of the best control setups on the system.