I think all of the people who think the 3GS will be a flop because of 3G'ers not moving over are crazy.
Apple sold 4.4million 3g models last quarter. That was without MMS or Video, and the people who bought it last quarter are not people who upgraded from the V1, if you were going to do that you already did. Those were new customers. Do you think that all of the sudden there will be no new customers??
Secondly, and I will probably get flamed, but the 3Gs to me is a much bigger upgrade then the V1 was to the 3G (at the time).
When the 3g came out all it gave me was 3G and GPS. I already had 16gb so I couldnt get larger memory, they didnt give me MMS and Video either.
Except for the external case the phone was the same, same processor and video, and I get much better battery life.
So I decided the 3g wasnt worth the upgrade. Then the 3gs comes, now to me its a huge upgrade, 3g of course but 7.2 version, 32gb, better camera, Video camera, MMS (yes the 3g does get that to but it didnt have it all this time either just like my V1, and I am betting most people who never bought an iphone are waiting for MMS), faster processor, better graphics (actually 720p capable if Apple decides to turn it on) and battery life closer to my original V1.
My point is you cant say the 3gs isnt a huge upgrade, it may not be for some, but for others its ginormous.
As for the lines being shorter, well this is the first time both Apple and AT&T offered preordering, I am one of the people who took advantage of that, and I am sure many others did to considering AT&T ran out by 6/13 of preorders.
Anyway good luck everyone and I am sure we will see some real sales figures lately. I am pretty sure everyone will be surprised because many of us V1ers came out in force and there were a ton of people on the fence about the iphone because of the lack of two VERY basic features MMS and Video. May sound silly but its true.