I've read in the past that artist are getting screwed by the music labels over the sale of their music online. In many cases the money goes to the label and not to the artist... NICE... So I've been worried that the book world might be the same, so it made me happy to see that at Mundania Press, their "default contract" gives authors 50% of revenue for ebooks.
In compensation for this grant of rights, the Publisher will pay the Author royalties based upon net sales (actual sales less returns) as reported by the Publisher's distributors as follows:
* For trade paperback copies sold less returns: fifteen percent (15%) of the net amount received for each sale.
* For electronic edition copies sold less returns: fifty percent (50%) of the net amount received for each sale.
http://www.mundania.com/contract.html