I wasn't able to get into the eshop until about 1pm PDT, and it still took me 2 tries, and the 2nd time I had the eshop loading screen spinning around for a good 8 minutes.
But man, with my Wii U and 3DS wallets combined, it's like I've just made money! Nice.
BTW, is the Best Buy Eshop card sale still going on?