Originally posted by WM.
I remember that in the comments on that blog entry quite a few people mentioned combo boxes, like you see all over the place in Watson, but he didn't seem too hot on those, so I think he must've used the weight of the Safari team to get this added to the OS. Oh, and later he publicly announced that there would be tabbing to form elements, IIRC.
Well, I *am* a developer.
WebKit is built into 10.3 now. I'm not sure if the APIs for it have been released or not, though. I know at least some other companies have access to them but they might still be under NDA.
Progressive loading of images has been built into the Mac OS since at least 7.6. It's part of QuickTime.