Don't have a Nintendo Network ID? Popular community posts can now be viewed on the web version of Miiverse.
Today's update for Nintendo's social network now allows those who aren't signed in with a Nintendo Network ID (NNID) to view popular posts and comments within a range of different 3DS and Wii U communities, filterable by console. "Player posts" and "All Posts" still require a user to be logged in, however.
When a member does sign in to the web version of Miiverse, the following page will be the Communities screen, as opposed to the activity feed, to start posting and reading quicker.
Are you using the web version of Miiverse, console or both?