Yep, especially in Japan, whenever a Pokemon game comes out, it's usually on top of the sales chart for the week. I saw Mystery Dungeon: Explorers of the Sky move around 200,000 copies on release.
The site doesn't have anything special, apart from some info. Gotta love the screenshots. 10 years on and Johto is finally getting some respect again. Arceus, Jirachi, the Hoenn legendaries, new areas and places, PokeWalker, having any Pokemon tag with you while walking(wonder how it's gonna keep up when you're on your Bike?), Day/Nite features returning, damn this is gonna be hell sweet.