The Old Iron Kingdoms
RPG (Published under Wizards Open Gaming License) was a great
RPG. Unfortunately it died after a couple of years and haven't really received any attention since 2007 (there abouts).
But there is a whole new edition on its way, due to be pre released at
Gen Con this summer - however it does look like it will shake things up a bit more than many had hoped, mainly by including minis as a very central part of the rules.
Besides that, I don't get this thread at all. You say you're at the
PP website and you see something called "Iron Kingdoms". Well... Press the damn'ed link! It tells you everything and more right there:
http://privateerpress.com/iron-kingdoms
Cheers