Check out Odiogo for an automatic text to audio recording of your blog entries. It will also add a link to your blog so that people can sign up for an rss feed for your site that will include your podcasts.
There is a brief advertisment for the service at the beginning of each podcast and some more unique local names it may not get pronounced exactly right but talk about an easy way to provide an audio opton for visitors to your site!
Actually they call the recordings "podiocasts" because they are not generated by humans!