Though twitter seems trivial to a lot of people, Wikipedia has 4 different suggestions[1] when you search for 'twitter revolution'. So perhaps it's not so trivial and celebrity-focused as it seems to us non-users.
And if someone used Post-it Notes in a novel way to aid revolutionary efforts, we'd suddenly decide that they are a critical piece of infrastructure that needed to be super-secure, too, right?
[1] http://en.wikipedia.org/wiki/Twitter_Revolution