Looking for Teachers Using Web 2.0 Tools in their Classrooms

I have a manuscript about Web 2.0 tools for teaching and learning currently under consideration for publication by ASCD. I am looking for 10 - 15 contributors willing to write vignettes or case students about why and how they are using Web 2.0 tools in their classroom to append to the text. I've attached a list of the applications reviewed and "Guidelines for Contributors" here and also at http://k24x7now.ning.com, where contributions are being submitted. Please share what you are doing here, too.