While I am not much of a podcaster, I know a few of my colleagues who would probably enjoy hosting their own radio show. Even as a foreign language teacher, I could see myself having my students do a small radio broadcast for a speaking activity.
Mixlr is a free broadcasting site that downloads an app to your computer or device. The free version gives you an hour of broadcasting whatever you wish. You can be a DJ and play music, do a talk show- whatever.
You can embed the broadcast into your blog so when people visit, they can listen to your podcast/ broadcast.
I can envision this as a way to do school announcements each day; it seems easy, as each broadcast gives you a specific embed code to add to the site. This would be a great way to link to social media as well. As you record, it also creates a live link to share on Facebook, Twitter, Tumbler and Google+. The showreel can be placed on a blog to see archived conversations.
There is also a chat component built into the program, so visitors can go to your showreel, listen live and ask questions to the speaker over the system.
I can see a lot of possibilities with a school using this program. A virtual interview | Daily announcement | A broadcast of a library program | A message from the administrator | A student radio show | Basketball game play by play - the list goes on and on.