Podcasting is a term inspired by the Apple Computer Corporation’s iPod. Podcasting refers to any hardware and software combination that allow users to download audio from the internet to a computer or another device (mp3 player, Ipod) for later listening. Unlike other media, users have complete control over when they hear the content.
A Wiki is a collaborative website that can be viewed and modified by anyone with a web browser. Wikis may be accessed online, or you may set-up an RSS feed so that subscribers are notified of new entries via email or mobile devices.
You may incorporate one or more wikis into your Blackboard Course. These wikis may be set to "private," only viewable between the instructor and each individual student, or "public," in which students may see each other's pages and make contributions.