Features of Wikis and Podcasts:
A podcast can be a regular recording of a person speaking about a topic.
A podcast can incorporate music clips, sound editing.
A podcast can be recorded or live interviews and discussions between two or more people.
A podcast is the verbal version of blogging.
A wiki is a web page with simple online editing tools for building content for the public.
A wiki keeps track of all changes to the pages.
A wiki can be edited by anyone.
Example of a wiki: http://capebit.wikispaces.com/
Example of a podcast: http://www.npr.org/2013/05/16/184485990/into-darkness-boldly-and-with-a-few-twists
Difference between a podcast and wiki:
A wiki is a web site anyone can edit and a podcast is an online audio broadcast people can listen to on a web site.