zelda_pinwheel, I agree with you about the possibilities of the ePub. I will take another look at it, since I've never actually even tried to use it (as I said, I just know the specs).
Btw, do you know if there is any way to generate ePub from (La)TeX source files?
PS: It is heresy to use a sans-serif for typesetting the body of the text! I only consider doing this when I need to typeset documents that my most terrible enemies will be obliged to read...

such as the jury of my PhD thesis, for example! just kidding... or not!