He designed Feng Shui, Shadowfist and Hero Wars, to name just a few. Stefano Gaudiano, our art director, has done lots of comic book work, and assembled a team of colorists and pencillers to help turn out over 500 hand-painted illustrations. Mike Raabe did the mythic art. He's done various work for Wizards of the Coast. Shawn Steele did any Windows-specific programming, and more importantly implemented our scripting language.
Developers create games.
Publishers sell them. Being an independent developer means you're eventually at the mercy of a publisher. But it's my understanding that most development is done this way. The obvious advantage to being both developer and publisher is that you can be true to your vision. The obvious disadvantage is that it divides your resources, both dollars and attention.