It’s the source code for www.ubuwebrss.com.
UbuWeb doesn’t offer a RSS feed or notification system for its front-page news items. This tool scrapes ubu.com (at 12 hour intervals) and generates an RSS feed of these news items, which can be integrated into news readers and used as a notification mechanism.
“UbuWeb is a completely independent resource dedicated to all strains of the avant-garde, ethnopoetics, and outsider arts.”