 <p>You should use the <a href="http://code.google.com/apis/feedburner/awareness_api.html" rel="nofollow">Feedburner Awareness API</a>. For instance you can retrieve the URL <a href="http://feedburner.google.com/api/awareness/1.0/GetFeedData?uri=http://feeds.feedburner.com/phpclassesblog-xml" rel="nofollow">feedburner.google.com/api/awareness/1.0/GetFeedData?uri=http://feeds.feedburner.com/phpclassesblog-xml</a> and then parse the returned XML to extract the relevant statistics.</p>