When I go to Tools-Network I get a message box that states the following: "Warning: An existing WordPress network was detected." I assumed that this warning had something to do with my SuperAdmin not showing up.
Okay. On mine I get this:
"Notice: The Network feature is already enabled. The original configuration steps are shown here for reference."
That means you didn't set it up correctly somehow.
I have modified the .htaccess and wp-config.php as I was told in the article on WP codex.
Undo that. We'll start over, basically :)
1) Add THIS to your wp-config.php
2) Go to Tools -> Network
That should bring you to a screen that says something like this:
Basically, what you've done is set it up out of sequence. I'll talk to Andrea, who wrote that page, and see if we can't get it cleaned up for RC1 :) She wrote that WAY back before Beta, when we were all still on Nightly.