A Natural History of Dragons by Marie Brennan
http://www.goodreads.com/book/show/1...ory-of-dragons
Tooth and Claw by Jo Walton
Anthony Trollope with dragons as the main characters. It's not a mash-up like Austen and zombies but a Victorian-style family saga whose characters happen to be dragons. Loosely based on Trollope's Framley Parsonage.
http://www.nancypearl.com/?cat=54