This blog post is about the preparation for a presentation, but there are links to the presentation, and another one someone else did, as well as other resources - a course for parents to do with their children, etc.
Has anyone used Thinkquest? It looks like a great way to introduce elementary students to social networking in a safe way. I also posted a great site that does online safety and cyberbulling in 15 minutes lessons with Garfield cartoons for kids.
Yes, I have used it primarily with middle school students and I have found it quite useful. The last time I used it was several years ago to set up a list of websites to use with a webquest, a very simple and easy thing to do.
This looks pretty promising. I also think the connections you made on this site are great - asking for resources and someone commented back with great resources on kids safety on the internet. Awesome!!