Ok, so I figured out a workaround. Thanks for turning me onto that rexswain site. It works better than
web-sniffer.net in terms of handling the larger files without timing out!!
So, here is what I can do...it's a hack, but it works at least. In order to bypass the timeout of Feedburner trying to get my podcast feed from my Wordpress instance I do the following:
1. Set my Wordpress Settings/Reading/Syndication Feeds Show the Most Recent to 50
2. I'm using the W3TotalCache plugin for Wordpress so I made sure that caching was enabled for RSS feeds
3. I emptied all cache in W3TotalCache
4. I go out to the rexswain site and plug in my RSS feed URL and hit submit. It then basically makes Wordpress/W3TotalCache cache the RSS/XML
5. When I go to Feedburner to retrieve the RSS, it has not problems as it can quickly (like only in a second) pull back the cached RSS data.
It's not ideal, but it appears to work.
Thanks for helping me narrow my attack a little and leading me to the ultimate answer.