We squeezed EPUB export into InDesign CS3 before the final IDPF standard was approved, when even the name of the format was still in doubt ( thus the feature name: "Export for Digital Editions"). The just-released InDesign CS4 takes EPUB support to a whole new level, adding embedded font support and TOC generation (which we had made available as a separate update after CS3 shipped), as well as floating anchored images, option to emit CSS ...