A small sampling of the Steampunk miniatures based on Smog on sale here. Alas, they're sold unpainted and unassembled. I believe they're all sculpted by Victor Martins and Gregory Clavilier and painted by Sebastien Picque. Here's the company's companion blog.
OK, one more:
"Panzerjunker U-Bot" from a different world called Mauser Earth.
*At Toycutter: Bioshock-themed pirate warband.
*Buy wargaming miniatures at eBay.