Nintendo president Satoru Iwata has explained to investors that the company is busy working on system-wide asynchronous multiplayer for Miiverse. Basically this means that you will be able to send your play data to Miiverse for others to download and play against at a different time. There’s no information on when asynchronous multiplayer is going to be implemented, but it’s certainly an interesting development by Nintendo.

Thanks, SortableShelf19