I just found out that the site Mypodcast.com will be closing as of Dec. 1 of this year. They posted a statement that anyone with podcasts there should save all their files, because they won't be able to access them otherwise. Also, you'll have to find another hosting site, change your bookmarks, and so forth.
I put this up because I have a podcast there, and I just wanted to let others know, in case they do too. Good luck.