Diane Corriette

      First Beat Media recently launched a free and unlimited podcast hosting
      service at www.MyPodcast.com,
      simplifying the podcast creation process with a free recorder, hosting,
      unlimited bandwidth, and the ability for users to earn money with their
      podcasts. Now podcast creators can avoid the high costs of hosting and
      bandwidth, and can transfer existing podcasts to the site.

Read more here http://www.prweb.com/releases/2007/2/prweb502748.htm

If you have been podcasting for more than 3 months and have at least 500 listeners you may be interested in joining the Podcast Network.  They provide you with everything you need to host your shows and you get to increase your audience by appealing to their listeners

http://gettingstarted.thepodcastnetwork.com/

Here’s their main podcast directory

http://www.thepodcastnetwork.com/

http://www.jellycast.com/

With Jellycast you can host, create and broadcast your podcasts to
        family, friends and the world, all for a nominal one-off set up charge
        with no strings or hidden costs down the line.