I bought a brand new 2.4 15" SR MBP on June 5th (the day they came out) and I used it for the last week very sparingly. I'm in the middle of finals so I didn't have much time to mess with it.
Over the weekend my friends were checking out the new laptop, and they pointed out the gap on the lid to me. I had noticed it earlier, but I thought I was being paranoid. I told them I noticed it too, and I definitely hadn't done anything to damage it.
I took it to the Apple Store last night complaining about the gap on the lid (I just dropped ~$2700.. anything less than perfect was unacceptable, especially since I was convinced to switch to Mac). The first guy I showed it to was cool about it, saying yeah you definitely want to make sure you're happy. Then he gave it to another guy who took it to the back and checked it out.
The first guy told me he was probably taking a hammer to it in the back (I think he might have lol) and in the meantime I looked at the MBPs on display. The ones on display didn't look nearly as bad as mine. When he came back out with my MBP, he said it was completely normal, and that all of them were like that. Although I didn't say anything at the moment, it looked like he had tried to adjust it or something because the gap definitely looked smaller.
I told him that the ones in the store looked like they had far less of a gap, but he tried to convince me that I was being paranoid. When I asked why the gap was on the left, and not an even gap on both sides, one of his little buddies tried to tell me that it's because the keyboard is sloped to the right for ergonomics (I laughed a little at that explanation). I asked why it would be like that because that would maybe alienate left-handed users, but I dropped the issue. Regardless, the guy offered to swap out the MBP, but he said if the new one had a gap that was worse, there was no way he was gonna exchange the new one with a waived restocking fee.
They rushed me out of the store (closing time) so I wasn't allowed to compare the two side by side, but now that I'm at home, here is my conclusion:
THE GAP IS FAR LESS PRONOUNCED IN THE NEW ONE EXCHANGED ON 6/12/07 THAN THE ORIGINAL I BOUGHT ON 6/5/07
The gap is still there, but it seems smaller than the last one (Not what I was hoping for, but hey, as long as I'm not the only one). It may be psychological, but I personally believe the new one looks better. Good luck with your purchase. If you're REALLY not satisfied, kindly ask for a new one. $2700 is not something you throw away.