Yup, I was one of those people....on Friday, I got in line at around 1:45 or so and had the best time hanging out there! Time really passed fairly quickly. We all chatted, talked on our soon-to-be-defunct cell phones, played with our MacBooks, MacBook Pros and Powerbooks.... Once the Apple store reopened at 6:00 PM, things moved right along and I was in the store by 6:30 PM (I was number 100 in line). For me, being there and waiting in line, then entering the store and high-fiving the employees (most of whom I recognized and who recognized me, so what does THAT tell you?), then stepping up to the Genius Bar and purchasing my iPhone was all part of the overall Experience Of Buying My iPhone. LOL!!
LOL... this may go OT - but I really don't miss Sprint by much right now.
My experience was different the day after. Went to the AT&T store on Fairfax Circle just to see if I could hold an iPhone. Was told they were in too short of a supply, and that by going on the web I could see what the experience was all about. This was like about 10:15AM. BTW I was told it would be 2-3 days for them to get one to me.
Then drove over Apple Tysons. No lines. A nice greeting at the door - no high fives, guess they were reserved for those that stood in line for hours on the 29th.

I was surprised that there were not great lines to look or buy the iPhone. Within minutes I was playing with one. After 15 or so minutes (including a call to my sister and a friend on the store's iPhone - they said the call quality was better than on my Treo 650) I was standing in line to get my 8GB iPHone.
Trust me, I really only wanted to look at the iPhone. I had been in touch with Sprint, they were willing to move me to the SERO plan ($30 for 500 daytime minutes, nights and weekends starting 7PM, and unlimited text messages - a very sweet plan - a very sweet offer). At that point I was looking at staying with them, with either the Moto Q or the new Mogul.
I tried both of them at a Sprint store, and they were better than my Treo 650. The Mogul though won out between those two. So with that in mind, that is why I went out to "just look" at the iPhone.
In my short time at Apple Tysons with the iPhone, I found it everything that I wish the Treo 650 had. To Sprint and Verizon - you all messed up on passing up on Apple's offer to be the exclusive network for the iPhone.
Along those thoughts - yes each network has its strengths and weaknesses. The EV-DO networks on Sprint and Verizon may be faster - but EDGE works for me. Yes, I will miss - for the time being - being able to take calls in the Metro Rail tunnels. But that will allow me to listen to some tunes or view a video on my iPhone - till AT&T adds service in the tunnels.
As too size of the network. Most are pretty equal. Until you look at the number of subscribers. I am getting more free M2M minutes than I ever got on Sprint.
So in the end do I miss Sprint? Not really.