Emily here from the PRX Helpdesk. PRX isn’t a podcast hosting site, so no feed will be created or updated when you upload to PRX.
To create a podcast, you’ll need either a podcast hosting site like Libsyn.com or a blog with hosted audio and an RSS feed: http://www.feedforall.com/podcasting-tutorial.htm. Google’s Blogger and feedburner are an easy way to go.
There are lots of resources online, and if there is an IT contact at Texas Folklife, he or she may also be able to help. Once you do have a podcast feed up and running, we can add it to our list of PRX member podcasts: http://www.prx.org/podcasts-by-members