Digitally Divided?

NetworkedTeacher, originally uploaded by courosa.

I came upon this diagram by following a link given in a tweet, ( a post in Twitter, for the uninitiated.) A colleague was looking for a chart or diagram to illustrate what was meant by Web 2.0 as it relates to education. As I looked at the diagram I couldn't help but notice that many of the web resources on the diagram are blocked by many school district filters.
Although retired, I still substitute in the building I retired from and I find it difficult, if not impossible, to do some of the things I would like to do because of this filtering. I am a frequent presenter at tech conferences, but am unable to do some of the research or networking needed for my sessions because of this filtering. I suppose I ought to note here, that I'm referring to what I do with my time at school, not class or student time!
I can only imagine the frustration active teachers must experience when they get back to school after attending a conference or workshop, and discover the tools they got so excited about are blocked by their districts' filters. I had to wait til I got home today to post this! Yup, Blogger is blocked!!
For the record, I can not get to Blogger, Flickr, my own website on Gogglepages, wikispaces, or even any of the image searching tools, such as Google or Yahoo image search. I can't get to my gmail account, the one I use for all my conference and tech related emails. I haven't tried yet, but I wouldn't be surprised to find other collaboration tools, such as Zoho or Stixxy to be blocked as well. I could probably run a check on many of the tools referenced on the chart, but I think you get my point. The tools are out there and it's time for administrators and/or legislators to realize the tremendous potential that's there, waiting to be tapped.