Re: Where are all my blogs?
Did you just make the necessary manual adjustments in addition to the automatic upgrade stuff. Read these 2 guides, but especially the 1st. Did you do all of those things (including editing the .htaccess file)?
http://wpmututorials.com/how-to/upgrading-from-wpmu-to-wp-3-0/
http://wpmu.org/important-things-you-should-know-before-upgrading-to-wordpress-3-0/