Some designated Podcast software to consider: Castblaster, Propaganda, and Mixmeister. Can't endorse any of these since I haven't used any yet-all of them currently only available in Windows format. I'm still using Bias Peak 4.1.1 an exellent recording software. The advantages of at least some of the 3 podcast specific programs I mentioned is: 1) the ability to direct record in mp3 without having to convert-saving a lot of time waiting for lengthy file conversion, 2) Write show notes which will publish to specified blo/website and produce related rss enclosures, and give you ftp upload link to your podcast host within program.
If any reader has experience with any of these please feel free to comment.