Now it appears you can make new posts direct from your PC, as detailed in the image here. Not only that but the web app will also allow you to view your friends/following lists, update your profile details and edit general Miiverse settings. According to another NeoGaf user, you will be able to view any Miiverse post despite not owning a Nintendo Network ID just using the URL will allow you to open the post. And, if that wasnt enough, the restriction between making new posts has seen a reduction to three minutes from the initial five minutes. You can access Miiverse through your browser at miiverse.nintendo.net to check out the new features.
via N4G: pc news feed http://n4g.com/news/1266998/miiverse-browser-update-allows-you-to-post-messages-and-follow-people
via N4G: pc news feed http://n4g.com/news/1266998/miiverse-browser-update-allows-you-to-post-messages-and-follow-people