Web 2.0 and the Elementary Classroom Environment

So, I am still working on my Master's degree, but seriously focusing on how technology is changing our classrooms. Currently I am working on a paper about the effect that the inclusion of Web 2.0 technology has or is having on the traditional learning environment. I don't seem to be able to find any research articles about it, and I implore all of you to help search some out. If you have any links to articles where research has been done on this situation, either qualitative or quantatative please let me know.

Thanks,

Zac