The concept of safety can encompass many different aspects, when considering internet use.
from Larry Ferlazzo's http://larryferlazzo.edublogs.org
http://www.simplek12.com/internetsafety offers many links as well as a curriculum (paid).
We watched a series of clips at:
http://www.nortellearnit.org/technology/Online_Safety/
Check your password: www.securitystats.com
Think Before You Post
Gina Trapani is the author of Upgrade Your Life and founding editor of Lifehacker.com.
She talks about what people find when they Google your name and gives some smart advice.