Here is one I created for my webmastering blog to introduce the concept of Web 2.0 to students. I recorded my own voice to use in it, and you can have four different layers of sound at once. I think I'll use this next year as part of my Open House speech or even with students at the beginning of the year to introduce some rules.
GoAnimate.com: Mrs. McCoy Web 2.0 by Kristy@fb
Like it? Create your own at GoAnimate.com.
Here is one created by the creator of my Book Study about another great Web 2.0 tool called WallWisher:
GoAnimate.com: Wallwisher by Dovewhisper