<IfModule mod_rewrite.c>
RewriteEngine On

RewriteBase /

# Lock WPMu out of the following subdomain directories...
# These occur before the final rewrite of www.domain.tld to domain.tld
# which is my preference on how the domain is branded

RewriteCond %{HTTP_HOST} forum.benefact.org
RewriteCond %{REQUEST_URI} !forum/
RewriteRule ^(.*)$ forum/$1 [L]

# Rewrite www.benefact.org to benefact.org with a 301
RewriteCond %{HTTP_HOST} ^www.(.*) [NC]
RewriteRule ^(.*) http://%1/$1 [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule . - [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?(wp-.*) $2 [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?(.*\.php)$ $2 [L]
RewriteRule . index.php [L]

#uploaded files
RewriteRule ^(.*/)?files/$ index.php [L]
RewriteRule ^(.*/)?files/(.*) wp-content/blogs.php?file=$2 [L]

</IfModule>