Using the WPMU SiteWide Feed plugin by IT Damager, it is possible for you to provide a site-wide feed in your WordPress MU community. This plugin generates three RSS 2.0 feeds comprising of posts, comments, and pages across all blogs on your WPMU powered site.

Using this plugin in WordPress MU not only allows you to provide a site-wide feed, but also gives you some nice configurations in the administration panel, as well. If you, your readers and your users would like to see what is being posted and discussed within your community - this plugin will provide you with a full feed that will do just that.

You can find the documentation for the WPMU SiteWide Feed Plugin here - and the developer has verified that it works with subdirectory AND VHOST (subdomain) installations of WordPress MU.

As anyone who as tried to run WordPress MU on a web server knows, you need to have a hosting partner who has the capability of handling the server requirements to run WordPress MU. I’m referring not only to the Apache, MYSQL and PHP requirements:

* PHP 4.2 or greater
* MySQL 4.0 or greater
* The mod_rewrite Apache module

I’m also referring to the VHost and DNS configurations that need to be made in the httpd.conf file at the server level. You will need this configuration if you intend to use the subdomain feature with WordPress MU. You can use either the subdomain or subdirectory feature in WordPress MU. This refers to the URL of each of the user blogs within your WordPress MU network:

• Subdirectory Method: http://yourdomain.com/user
• Subdomain Method: http://user.yourdomain.com

The Subdomain Method is the most popular, and most recommended (most MU plugins are created for use with the subdomain method).