Advice re: Podcasting/iTunes/Amazon S3 Option

Hello,

I’m looking for advice as to the simplest way of setting up a podcast using wordpress. I’d like it to be sumbitted to the iTunes directory and if the bandwidth usage looks like it might eventually exceed my shared webhosting then I’d like to be able to transfer the storage of the MP3s to Amazon S3. I’d probably like to retain the option to expand this to a full blog therefore I’d like the feed to just use the posts categorised as ‘Podcast’

Many thanks in advance.