I have been checking the Kid Icarus official site for a week or two now. The reason why is because I am wondering if there will be any mass distribution of the AR cards. I don't live near enough a major convention like PAX or ComicCon so I can't get any. I know of the Club Nintendo distribution, but it was poorly communicated and was UBER limited. And like the Ocarina of Time 3D soundtrack, the web traffic was so bad, you couldn't get it.

I believe every copy of KI:U came with 5 AR cards. I also remember ordering a few cards from Club Nintendo, but I have no idea where the link is or what website it was on. I'm not even sure if they are still taking orders (because they came with a "Make sure to purchase Kid Icarus: Uprising on release!" card).

What I do know is one of the cards from ordering says to lookout for events. There is a possibility that they will distribute AR cards in the same places they distribute Pokemon events (such as Gamestop).