BTW, some of those tutorials are:
– https://wpmu.org/how-to-upgrade-wpmu-2-9-2-to-wordpress-3-0-in-5-easy-steps/
– https://wpmu.org/import-export-wordpress-sites-multisite/
I’ve also tried to import the from WPMU Dev database to WP Multisite, and many other ways but all of them crashed.
