WPMU DEV has published an interesting video “How to Merge Multiple WordPress Sites into one MultiSite”, as part of an article “Importing & Exporting WordPress Sites To and From a Multisite Install”.
“While WordPress will import most things from one site to another (such as users, posts, pages, categories, media files, and more), it won’t import everything.
More specifically, it won’t automatically import your plugins or themes. It also won’t import some of your settings, things such as your permalinks structure, the title of your site, or your timezone settings. You’ll have to go into your new site and set these things up again.”
Read full article at: http://wpmu.org/import-export-wordpress-sites-multisite/
