21 Classes: tailored educational blogs

From Robin Goode comes this news of a beta called 21 Classes which is a blogging service specifically designed to meet the needs of the educational community. Included in its features are the ability to control student entries, engage in collaborative posting, invite friends etc. But as a bit of tub thumping, why is it that the business community can see an opportunity in providing this type of service to the educational community yet so many in education stick to a stand and deliver model of education. To me it's a bit like a four wheel drive (SUV) bogged on the beach. The driver insists on spinning the wheels wildly but all that happens is the vehicle goes deeper and deeper. Then the tide comes in. To their credit some Voc. Ed. providers have official policies on the use of blogs and wikis. Others block access to them, which is really strange, when they constitute so much of what the Internet is becoming.