Magic Under Glass by Jaclyn Dolamore (Published by Bloomsbury, Feburary 2010)
Nimira is a music-hall performer forced to dance for pennies to an audience of leering drunks. When wealthy sorcerer Hollin Parry hires her to do a special act - singing accompaniment to an exquisite piano-playing automaton, Nimira believes it is the start of a new life. In Parry's world, however, buried secrets stir. Unsettling below-stairs rumours abound about ghosts, a mad woman roaming the halls, and of Parry's involvement in a gang of ruthless sorcerers who torture fairies for sport. When Nimira discovers the spirit of a dashing young fairy gentleman is trapped inside the automaton's stiff limbs, waiting for someone to break the curse and set him free, the two fall in love. But it is a love set against a dreadful race against time to save the entire fairy realm, which is in mortal peril. [close]
I know the release date for this one is pretty far off, but I fell in love with the cover, and the story sounds really unique and interesting for a YA fantasy.