Password Protect a Podcast Feed?

http://wordpress.org/extend/plugins/advanced-post-privacy/ http://wordpress.org/extend/plugins/show-private/ Either of these would work, depending on how you want to share the posts.

How do I get my podcast feed created?

The URL you provided works fine for me: Link This returns the correct feed. you may have had some WordPress caching happening, which prevented the feed from being returned, but it’s working now.

Creating a podcast directory site – how to allow user to upload “large” files?

Just to add to what other have said, beyond changing your php.ini settings, upload size is limited mainly by the browser/connection. There are more reliable browser bases solutions that use java/flash or a combination of tech that allow for uploads reliably up to 100MB. http://www.plupload.com/ http://www.swfupload.org/ http://www.uploadify.com/ http://jumploader.com/