A couple of years ago, I asked my 8th grade students to research the Web 2.0 and prepare multimedia presentations as their final project for their Language Arts class. Back then I learned about the Web 2.0, Ajax, Php,blogs, social networking, wikis, instant messaging, and all those other terms in this Wikipedia tag cloud
http://en.wikipedia.org/wiki/File:Web_2.0_Map.svg
I had each student research a separate topic and, in this fashion, I was introduced to the Web 2.0 concepts - the naming of all those technologies I had been using and had heard of, but hadn't realized had been named.
So, I am not new to this, but hadn't really thought how to use it in my media center (high school now). I did put up some web pages for the center, linked to multiple online resources but have not promoted interactivity with my students in the Web 2.0 fashion - my pages are a rather static and old fashioned Web 1.0 style .
I am here then to get ideas for this purpose, while the other part of my brain is busy figuring out how to convince my principal to let me purchase a Wii for the media center so my students can prepare for the SAT or just go bowling at lunch time.