I recently published a podcast hosted on WordPress.com on iTunes and it says "Podcasts by Unknown". It seems like it is missing the author tag. My question is that how can I add the author tag to the RSS since I used the RSS widget to expose my RSS?
iTunes uses extra tags for author information, category classification, ... I believe you can't add these using WordPress.com. What you can do is pick up your feed using FeedBurner and submit that URL to iTunes instead. FeedBurner has support for podcasts and allows you to fill in the extra iTunes tags.