Some of my friends have started to open their own twitter site recently. It's like a kind of boom. If you have a Facebook account, it seems similar with the "what's on your mind?" part on the SNS.
It will be convenient to write down as a memo for myself. And it is suitable for mobile users to write in short messages. I am thinking of short message version of Feel the Globe. It will not be structured one, but just a collection of ideas when it comes out.