Bernard Shaw and a couple of other reporters from what I remember. I distinctly recall tuning in a few minutes after things started and listening to them hide in the hotel room as Iraqi security started to clear the hotel that all of the reporters were staying in at the time.
Just remembered: Peter Arnett. He was the only one who had a phone line out from Iraq during the first attacks.
Wolf Blitzer, IIRC, did that.
Wolf Blitzer was the CNN reporter at the Pentagon that day. He appears in the first video linked above.