@pkra Regarding the “once led Ojan Vafai to call math layout fundamentally incompatible with CSS layout” I’m not sure that’s what Ojan actually said though.
I mean, I believe he and others would probably say we could had a more compatible model for math layout—as long it wasn’t “bottom-up” in the way MathML’s layout model is.
[marcysutton]@jitendra: Target.com’s homepage used to have a good solution for that, there was a heading with something to the effect of “this page is not yet fully loaded” and labeled load more buttons to load more content from the keyboard.