Here’s a script I found to get a remote RSS feed, for example the Feedburner feed, and save it to a local XML file.
This would be useful for moments when you cannot connect to the RSS feed directly in a plugin or application.
You could then try and load the local file instead. Obviously a cron task would be added to run this script to reload the RSS feed a couple of times a day.

<?php
$ch = curl_init("http://feeds.feedburner.com/EWEABlog?format=xml");
$fp = fopen("feedburner.xml", "w");
curl_setopt($ch, CURLOPT_FILE, $fp);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_exec($ch);
curl_close($ch);
fclose($fp);
?>

This script would then write the contents of the RSS feed to the local file “feedburner.xml”