We just got a quick update from the OEM, the front frame you see on the right was made with a recently improved manufacturing process. What's the difference you ask? Well, the older process they used before has a chance to produce the "Rough & Bent" effect on the frame and made it not sit flush on the middle frame as shown below. But that's no more thanks to their revision on the way they manufacture them. I was told this was one of the reason why Apple didn't mass produce them yet. All new orders will have the new and improved front frame.
In addition, I was told that there are no signs that a hardware fix for the antenna issue is underway.
Buy the DIY White iPhone 4 Kit
Should have seen this coming, White iPhone 4 now ships "Later This Year" and would that be in "limited quantities"?
Statement by Apple on White iPhone 4
CUPERTINO, Calif., July 23 /PRNewswire-FirstCall/ — White models of Apple's new iPhone® 4 have continued to be more challenging to manufacture than we originally expected, and as a result they will not be available until later this year. The availability of the more popular iPhone 4 black models is not affected.
Apple at the iPhone 4 Antenna Press Conference today announced that the white iPhone 4 is still on track for a July launch but in "Limited Quantities".