If you found this blog, then you know how easy it is to create your own blog... and by extension a podcast.
You can see that this is really not so difficult. If you create your own blog, then you have completed the first step. If you need a place to store your audio files, don't forget your UH user account. You can find more information on your account at http://www.hawaii.edu/personalhp/. You can use FTP software like SSH (Windows) or Fugu (Mac) to upload files to your account.