I just went through and did everything for the Network setup of WP3.0
After editing my .htaccess and wp-config.php file I've gone to login and it doesn't accept the login anymore. Actually, it DOES accept it (since I don't get an error), but it just stays on the login screen. If I try an incorrect password it fails (I get the error message), but the correct password just appears to refresh the screen (without the password dots)
I've tried this on different browsers. no good. I've tried this with just putting wp-admin after the url and that takes me to the front page but is not logged in.
I've tried changing my password and the same thing happens.
I'm going to try reversing what I've done, but I'm fearing the worst here