Why Twitter is great:
I'm sitting in my apartment and hear a lot of helicopter activity outside, so I go to NY1's website to see if I can find out what's going on, but they haven't reported anything yet. So then I think, How can I find out what's going on right now shy of getting a police scanner? (That would be very old lady of me, no?) By doing a Twitter search, of course. So, I go to Twitter and search for "helicopter" and find out that a car drove in Gowanus Canal, which is not too far away from my apartment.
Even if you hate Twitter, you should use it for things like this. Real-time search results. No waiting for a blogger to write a story about what's going on then waiting for their RSS feed to pick it up so it shows up in blog search results. Quick, easy answers.