KMF and I sat down and worked through the rendering possibilities for note markers. We've arrived at a good solution, now working on dev pending approval, and in the process I've implemented better accessibility by making the note number spans focusable (all you need to do is put @tabindex="0" on an element to make it focusable and put it into the document tab index list in document order). I've also put an onfocus event that shows the footnote, so if you tab through the footnotes you'll see them pop up as they get the focus, rather than having to press another key. This is good progress.