The best part of this rubric isn't Clarence's rubric (although I think it's a great start) but the other rubrics that are shared in the comments, especially Delores Gende's stuff "http://bit.ly/bRZw7V"
Prezi is a way cool (that's a high level technology term) presentation tool that I'm playing with. Here is an example that a student did for an honors physics class that I came across. I've bookmarked some other stuff this teacher has done, she is AMAZING! I haven't introduced Prezi yet because I don't think most teachers are ready for it, but I think this is a great example of rigor and cool.
The Great Books Foundation is focusing on the holocaust and the Diary of Anne Frank in this piece. I believe it is an excellent example of how to inorporate technology into instruction to enhance the conversation. Note that they are utilizing Voicethread as a tool for increasing conversation about the topic.