Google launched a new feature yesterday which enables the search engine to scan RSS and Atom feeds for the discovery of new webpages.
RSS/Atom feeds is a mechanism for content publication and allow readers to easely check for new content from publishers. By scanning these feeds Google will get new pages into their index more quickly than traditional crawling methods.
Adding feeds to current crawling techniques might lead to content being indexed faster.
(source: Google Webmaster Central Blog)