Nintendo eShop cards (picture below) have appeared on the Walmart website.  There are three different values for the cards and it looks like as of right now they will come in $20, $35, and $50 denominations.  The website also says “Replenish eWallet” and “Get demos, game trailers, user ratings and previews”.  So it seems like maybe the eShop is going to have an ‘eWallet’ hold all of the eMoney and Nintendo is probably going to use a similar eShop set up similar to what is already available on the 3DS.  This makes sense since the online market for the 3DS and Wii U share the same name but I am more referring to what will be available on the eShop.   You can already get demos, trailers, ratings, and previews on the 3DS eShop but entertaining the possibility of being able to play some Wii U game demos is very exciting.