Re: OK… How painful is the transition from MU to WP 3.0 going to be?
Re WP 3.0 officially
From the trenches – https://wordpress.org/support/topic/345127?replies=176
From the Lead Devs/Commiters – http://wpdevel.wordpress.com/
From Trac
– https://core.trac.wordpress.org/ticket/11644
No sweat, huh 
