The term has also come to refer to genres of literature and film. The Golden Compass series is an example of steampunk literature, because the antique aesthetic of the world is hinged on very different, but very modern technology. So is SuckerPunch, although I know you are about to cringe, I thought the movie was cool because of the music and the steampunk costumes and set design.
Here is a nice little arrangement of inspiration for steampunk fashion:
And here is a small selection of steampunk gadgets... Items which have either been originally created or have been "steampunked" to fit the look.