Maths.org
I recently updated the maths.org website to show random bits from all the RSS feeds of the other *maths.org subdomains.
The page pulls in the RSS feeds using the wonderfully easy php command file_get_contents($FEED-URL); the XML is then parsed and the relevant parts stuffed in an array which I then randomly select 2 features from each site.
It makes good use of the main domain as a feed in to the other sites with out the overhead of content creation.
