What have I found? Good question! There's lots here and I've only scratched the surface. Let me think... Here are a few things i found already...
A neat post about creating free avatars here: http://www.classroom20.com/profile/LynneH (or… www.voki.com)
Unfortunately, I forget who posted this next one, but I saved an excerpt from the post: "For teaching how words are connected take a look at http://www.visuwords.com/. It's an online graphical dictionary. It uses Princeton University's Wordnet database. Be prepared to spend a little time there. It's fun moving the words around and seeing the effect on the whole picture."
And, I haven't had a chance to investigate this link yet (http://www.classroom20.com/forum/topic/show?id=649749%3ATopic%3A221567&xgs=1) but supposedly there are a bunch of tutorials, including one to help evaluate the accuracy of websites.