I had an Omnia i900, and the camera on that blew this one out of the water. To say that I'm disappointed in the picture quality would be an understatement. The Omnia's camera wasn't great until the color settings were tweaked a tiny bit, but then it took really stunning, crisp photos, which isn't the case with the Captivate, even tweaking the same settings. Another thing that bugs me to no end is that Samsung still hasn't allowed us some way to make our custom settings permanent, so that every time we open the camera application, we have to change everything over again.
What really irks me, though, is that the Vibrant takes better, crisper shots than the Captivate, and they have all the same hardware.