I posted a fair amount of material about the Geometry of the Conic Sections — basically my December 5 Asilomar talk, supporting pages and documents, and more or less closely related material.
Check it out, and follow the links, as there are quite a few new things to look at! Including Web pages, PDFs, images, and mini-movies, I uploaded a total of 78 items.
–Henri
Henri's Math Education Blog 