Global tag and category RSS feeds
Would you like to have global (i.e. site wide) RSS feeds for every tag and category on your WordPress MU site?
Cool, well this plugin does exactly that for you :)
Just make sure you have our post indexer plugin installed and then drop this plugin into /wp-content/.
Now, if someone on blog1.yourdomain.com writes a post and tags or categorizes it ‘politics’ and someone on blog45.yourdomain.com also write a posts and tag or categorizes it as ‘politics’ – now both of their posts will appear in http://yourdomain.com/wp-content/tag-feed.php?tag=politics
Neat huh :)
And you can do that for any tag or category on the entire site.
Simply edit this formula to suit your requirements: http://yourdomain.tld/wp-content/tag-feed.php?tag=TAG
The global / site wide RSS tag and category feed plugin can be downloaded by WPMU DEV Premium Members here.