That's true; ePub is certainly trying to do the right thing here. I haven't used it much myself, so I don't know how well it works. For my own uses, I'd like to

That's true; ePub is certainly trying to do the right thing here. I haven't used it much myself, so I don't know how well it works. For my own uses, I'd like to get decent equations and LaTeX-like special characters (e.g. \nabla), but I can live with embedded PNG or GIF. (Not that that really alters the basic point, which was that HTML, by itself, isn't enough. The object tag might be a good enough solution, I don't know.)