A less complicated way to publish your podcast is to use a podcast hosting service. Services like SolidCasts, LibSyn, and PodOmatic allow you to upload your audio file to their site through a Web browser. Then you are prompted to enter information about your podcast. Podcast hosting services then generate the news feed and a website for your podcast.
Some hosting services are free and others charge monthly or yearly fees. While a hosting service is the easiest way to publish, if the hosting service goes out of business or you stop paying the fee, your podcast will be deleted from their servers and, thus, unavailable to your listeners.
There really are many hosting service options. I've created a chart with six selected hosting companies. The chart shows if there is a free version and what you get with the paid version.
My recommendations? If you are going to pay, I suggest LibSyn (short for Liberated Syndication). It's $5 per month and you receive 100 MB per month of storage and unlimited bandwidth (downloads). This is the service I use. I like the per month model because LibSyn archives all past episodes. I probably have close to a gigabyte hosted there by now. If you are going with a free service, I recommend SolidCasts.com. SolidCasts has no advertising and they give you 100 MB free "for life." Be aware, the 100 MB limit is not monthly and means that once you fill it up, you'll have to delete old episodes to make room for new ones.