Does anyone have one Club Nintendo Registration code they can give me?

First of all, if you don't already know, the 3DS is a /next-generation console/, meaning it's to the DS like the PS3 is to the PS2: the next console, not an update. Because of this, the DS line will probably die out next year, as the 3DS will be taking over. (Nintendo themselves are discontinuing the Lite; DSi and XL probably only have a little longer.) It is worth getting over the regular DS, though that depends on when you get it.