parenthetical comment :
lots of ebooks have footnotes. you can put them at the end of the book and add hyperlinks or insert them into the text immediately after the paragraph referencing them, for example. and the epub format is able to manage *true* footnotes which will be displayed at the bottom of the page. so footnotes should definitely not be an argument not to release a book in digital format. i have plenty of ebooks already with footnotes in them. (and since my eb1150 has a touch screen and can understand hyperlinks, in .imp format footnotes are no trouble at all.
)
anyway, clicky clicky...