Looks like Nintendo's hardware sales may have spiked over the holiday, many users are reporting problems with various Nintendo Network services including the Miiverse and eShop. Read more at the link below.
Nintendo Taking eShop Offline to Remedy Connection Woes
Last edited by SNES_Master; 12-27-2013 at 10:15 AM.
In addition, Pokemon Bank launched in Japan on Wednesday (and was supposed to launch in North America today) which added additional load to the servers among showing that one of the features of the bank was completely broken (block transfers of "illegal" pokemon).