As currently specified in HTML 5's section 3.17.3, WebKit should support the event-source element. This would assist in reading remote event sources in HTML documents.
The element and API have now been replaced in the HTML5 draft by an EventSource object. See http://html5.org/tools/web-apps-tracker?from=2869&to=2870
server-sent events were added in bug 14997. We probably won't add the event-source element, though, since that has been obsoleted.