I've been working on a d20 supplement for superheroes. I'm calling it the Super-Fantasy Powers System. While I've used and enjoyed both Mutants & Masterminds and Blood & Vigilance, I wanted something that gave a different feel and that I felt balanced the powers a little more.
As rpgs are modular, you can swap in and out a great deal of material and still have a cohesive game.
I'm using this powers module in my current d20 Modern campaign, but there are SO MANY powers I can't try them all at every character level. What I'm looking for are play-testers who are willing to give me feed-back.
I've set up a wiki at http://super-fantasy.wikidot.com. Please feel free to use the system in your d20 game, and please offer me feed-back. I'd even appreciate help from someone who has a chance to look over the material, but can't actually play-test it.

Thank you,
David B. Goode