We are currently running MU-2.7.1 and would like to upgrade. I read (http://mu.wordpress.org) that MU no longer exists and that it is now included in the wordpress installation and is activated by a line in the configuration.
I attempted to upgrade to wp.3.0.1 (manually) and was not able to activate the 'Network' option under the Tools menu. I also had some theming problems related to what I belive were legacy MU functions.
I reverted the install back to 2.7.1 and thought I'd look to the list for some advice.
What are my options here?