What is RSS?
Message Boards feeds are published in a feed format called Really Simple Syndication, or RSS. It's a standard for publishing regular updates to Web-based content. RSS is based on XML, a widely used standard for information exchange between applications on the Internet.
There is an orange RSS button on Yahoo! Message Boards just below the list of topics for each board. Clicking this button opens the feed and you can use the URL in your own RSS reader or My Yahoo! to track the activity in the board.