That sent me down a memory lane of my experience at that event. I haven't attended many conferences over the years, but Macworld Expo in 2007 was one of them. In fact, that was the only Macworld I ever attended. But yes, I was also in the audience for the historic occasion of Steve Jobs introducing the first iPhone.
My seat was rather far back, but I was there (that's a repeater screen on top, and the live stage at the bottom):
Unlike Jason, I didn't get to touch one, but I did get to see it up close, behind well-guarded glass:
After the show, I wrote a followup blog post with my initial impressions of the iPhone and other news at the event (introduction of the Apple TV, and Apple changing its name). Reading over that post now is somewhat amusing, with concerns over the keyboard and developer access.
I had a bunch of other photos from the show, showing various events and presentations, the show floor, iPhone demos, etc. Ah, memories.