And after all this, Twitter still does not have a viable business model.
...more pertinently, App.net didn't have one either - and they had an open API, charged real money and did all the things HNers' idealized version of Twitter would.
Either:
It is cool. So we must use it.
Or:
Everyone else is using it so we must use it too.
Seriously:
140 characters? Feature?
Everyone can read everything? Feature?
The two biggest technical "features" of twitter can be arrived at by dumbing down either google+ or facebook 98%.
And anytime I've looked at anything remotely political, I had to take a bath afterwards
I use it for things like gaming, talking to locals (almost everyone I know in my current city I met through Twitter, or through someone I met through Twitter), getting local news, and keeping up with friends.