I first get my news thru Twitter for the most part.
Here I am on a Garden Forum ! I email old friends & family. DD & DS & I use text to communicate. I try to use face-to-face interactions with nearby friends & neighbors. Twitter could be used for all of that but it would be a little awkward. (Don't get me started on my now dated relationship with Facebook .)
I follow the reporters - the "chattering class" - on Twitter. They chat amongst themselves quite a bit and share links to stories. Off I go . . .
Twitter is something that you can use to find out what people are involved in. Like that Japanese tsunami . . !! Or, this morning: #syntagma takes you to the demonstrations in Greece. I don't know much about this and don't even know what syntagma means but, lots of people do.
One can also use Twitter for simpler sorts of things. Example: if you are attending a conference, you may be directed to a hashtag like "#gardenexpo" where you could keep abreast to what is going on and maybe figure out where your friends are planning to have lunch !
There are other searches that can have a real sobering affect while you are keeping your finger on the pulse of things. Note the aforementioned Japanese tsunami. But, this morning I looked at #poverty. There are a few points of light in the communication - like in Rwanda & Haiti. Still, I sure got into that old sinking feeling after reading for a few minutes . . .