@Psymon: You might want to look at some of the eBooks from Liz Castro (see
http://www.elizabethcastro.com/ ) and her blog
http://www.pigsgourdsandwikis.com/ for tips on ePub creation for iBooks.
Her Blog DOES contain a wide range of topics so you might need to fillter by eBooks, or ePubs or iPod or iBooks to find appropriate posts.