maybe they are updating the music on the shop or something, but they did say that the maintenance will probably take up to 24 hours, so it MAY be something big. 

Nope, they're just working on the servers.

 

 

Some of you may have had some trouble accessing the eShop today, and having assumed it was the usual short weekly session we decided to wait a short while. Then we waited a little longer.

In actual fact, the eShop will likely be down for most of 2nd November due to a potential 24-hour maintenance window; naturally Nintendo may finish its work quicker than that. It's only the eShop platforms and the equivalent download stores on Wii and DS that are down for that extended period, with the maintenance due to end at 7pm Pacific / 10pm Eastern on 2nd November, which is 3am UK / 4am CET on 3rd November for Europeans.

Before you get too excited, though, the following tweet from Nintendo's Japanese account has indicated this is a major server change, so won't necessarily lead to anything tangible and exciting for gamers.

Source, with the tweet included: http://www.nintendolife.com/news/2015/11/monster_eshop_maintenance_to_run_through_most_of_2nd_november