I have been keeping on eye on this breed of genre for a bit now. I don't subscribe to any newsletters or forums that discuss romance fiction so I may be way behind in blogging about this new trend but "steampunk romance" has seemingly been digging its claws into the mainstream since last year. As far as I am concerned, anything that moves away from the vampire romance is somewhat a breath of fresh air. It will be fascinating to see what authors do with this.
I have to admit it feels a little strange to see romance go this direction. I have always associated steampunk with science fiction and, of course, fashion.
For reference here are some authors and titles that relate:
Gail Dayon's
HEART'S BLOOD and NEW BLOOD Katie MacAlister's
STEAMED: A STEAMPUNK ROMANCE Ginn Hale's
WICKED GENTLEMEN Meljean Brooke's
THE IRON DUKE (also a relating prequel story in BURNING UP anthology)
There are also couple of YA books in the works but I am sure 2010 will be seeing plenty of steampunk on it's shelves.