Sermon Cloud is an unusual and cool site. It stores sermons, which you can listen to online, download or listen as an MP3 type file, or download as a Podcast.
Good ways to wade in the water of Sermon Cloud is to check out the most popular sermons today, "Most amens for the week", month, or best sermons ever. Scroll to the bottom of the home page to see a category listing.
The Sermon Cloud "swicki" on the right shows which search terms (tags) are most popular on the site.
Pastors can syndicate, podcast, and publish sermons online - assuming that they are courageous and confident enough.