Unfortunately, I do not know much actual Steampunk, but I like what I've seen. If someone will give me a few pointers, I could be "coaxed" into playing. Alright, you twisted my arm, I'll give it a whirl. I can always do some dashing, dark gentleman type thing, or whatever, just don't expect a good, pure white-knight
Mmmn, dashing and dark.
No sir, I'm not one for Prince Charmings, myself!
Steampunk isn't that difficult of a concept, really... If you go back to when things were steam-powered (old west era isn't far off)... the old steamboats on the Mississippi, for example, and the old (amazingly beautiful), massive steam-trains. One of the finest examples of steampunk in media, is Wild Wild West, the movie
Clockwork Punk (not sure if there is an actual term for it, but there should be!) is very very much like Steampunk, and easily cooperates with Steampunk themes. However, now you're throwing in the gears and cogs and such that you'd find in antique watches (think early 1900s, and the pocketwatch). A fantastic reference is the computer game Syberia
People who love these themes (I am no exception), love to dress to represent those eras, too. If I were to gauge the main inspiration for the fashion, I'd put it as a curious mix of old west/1900's meets Renaissance. The clothing is usually very artistic and fancy, much fancier than the average clothing of either era, but you can see strong influences nonetheless.