I remember waking up and turning on CNN like I always do, and seeing the second plane hit. I called my wife in and we both sat there, in silence. After a few minutes, I looked at her and said "That wasn't an accident."
I remmeber spending the rest of the day at work, glued to TW. We had news updates here 5 - 10 minutes before CNN becuase of all the local stations and people in NYC being able to see it.
I also remember the "Check in" Thread where all the TWers in NYC were posting to say they were ok, getting a "chain" going to find everyone else.