Links to videos used in PD presentation (YouTube):
Did You Know III
We Think

Other videos of interest (YouTube)
2008 - Did You Know
Did You Know (original version)
Did You Know 2.0
Eric Schmidt, Web 2.0 vs. Web 3.0

Common Craft - Explanations in Plain English
Some excellent, short, videos on a variety of topics related to Web 2.0 including podcasting, wikis, and blogs.
Common Craft Website

Maximizing the use of Web 2.0 would result in a "Networked Student" as illustrated in the following YouTube video:
Networked Student