Out In Blue by Sarah Gilman
This is book 1 in the Return to Sanctuary series. I want to read it ssooo bad, I love books about angels! It comes out between Aug 2011 and Sept 2011, each site I look at says something different, so i don't know when its out, unfortunately.
In a violent world where fallen archangels are hunted for their valuable plumage, Wren knows one thing for certain: the human woman who saved him from a poacher attack will die if she stays with him. The demon responsible for his parents' gruesome deaths two decades ago pines for the chance to rip apart any woman who stands under Wren's wing.