Publisher Reactions To Google Print; What About Authors?

New Google Service May Strain Old Ties in Bookselling from the New York Times today has some nice quotes on how publishers are reacting to the expansion of the Google Print service.

Here's something I haven't yet seen (if you have, tell me). How are authors going to react? After all, publishers are now set to earn revenue off AdSense ads that appear in these books. But the books are the works for the respective authors. Shouldn't they get a share? Do contracts cover this? Will they have to going forward?