A podcast is simply a list of audio files that can be read by another program (such as iTunes) in order to automatically download newly added content.
Simple, just use the link itpc://www.exoduspodcasts.com/podcasts/exoduspodcast_full.php to automatically subscribe to the podcast with iTunes.
or if you would like to view the RSS feed directly, the link is http://www.exoduspodcasts.com/podcasts/exoduspodcasts_full.php
No. Although the term podcast was birthed from the combination of ipod+brodcast, a podcast is really just an xml file and can be read by an number of different programs. Firefox and IE both allows you to view a podcast feed.