The nice thing is that because it was d20, it's pretty easy to convert the material to any D&D-type ruleset.
Malhavoc and Fiery Dragon even made a handful of free stuff for the setting back in the day.
Here's what you'll find in that folder:
- GenCon 2005 Demo, in both Microsoft Word and RTF formats
- The King Must Die! introductory adventure, plus a pdf of pre-gens and a pdf of tokens
- Borgnok's Raid, a free web enhancement for Mastering Iron Heroes
from Fiery Dragon:
- Bloodwood campaign setting
- Glacier Keep adventure for 4th level characters
All of these come courtesy of the Internet Archive Wayback Machine and doing a Google site-specific, file-type search (i.e.: typing "site:foo.com filetype:pdf" into Google's search box, minus the quotation marks, of course).
EDIT: Link & files removed on 2015-03-05. I figure if you haven't grabbed them by now, you aren't going to, and I need to clean up space in my Dropbox account.