Odiogo offers a free, ad supported, service that reads the text of your RSS feed from your blog and converts each blog post into an audio file suitable for podcasting. This service not only gives your blog a voice, it also allows your blog posts to be made available as iPod ready audio files. The more channels you can utilise to distribute your content, the better.

The Odiogo service is easy to install and, once you are up and running, you can submit your podcast to a number of  specialist podcast directories. I've been impressed by the approach used by the Pod Submitter service which will distribute your podcast to 55 directories free of charge.. but with a degree of reciprocation. Check it out and you'll see their intelligent approach to viral marketing!

One of the primary benefits of creating and distributing a keyword based podcasts is the boost in link popularity that you can gain. However, an often overlooked benefit is that very few of your competitors will be creating and distributing podcasts and your links will probably rank quite highly for your keyword phrases. And, of course, you will gain traffic and "listeners" who search for relevant content to play on their iPods.

As well as converting your blog posts, you can also record your own podcasts using the free Audacity audio recording application. If you're short of ideas, you can create a recording based on your own articles or articles to which you have private label rights. Again you can use Pod Submitter to distribute your podcast to their list of directories.