For those who don't troll the forums, here's a fun little character build. Whether you want a living suit of elven quicksilver, or a steam-belching automaton straight out of Big O, here's how you make Iron Man in Pathfinder.
Been rooting for a local Texas RPG Kickstarter by the name Tephra by the company group Cracked Monocle. They have blasted through their original goal of raising $1,000 and are currently left with 6 hours and have raised over $21,000. Grab a chance to get in on their book if you are interested: http://www.kickstarter.com/projects/257331192/tephra-the-steampunk-rpg
Though not technically steampunk, we just finished up a campaign tonight. I 1-shotted a challenge level 16 dracolich and essentially kneecapped the final boss fight. It was one of the most epic moments of my life as a gamer.