Cliff, Michael, we're in the middle of trying to finish up issue 2 of the ENWorld Gamer, so it might a while before we get around to replying to your pieces. Heck, I still haven't replied to GrumpyCelt on his book proposal yet. Many apologies for that.
Steve, I understand where you're coming from, but it is much easier for us if we don't have to worry about misusing someone's material. Due to the Open Gaming License, it isn't that hard to reuse something someone submits, so the only reason I can see an author would be uncomfortable giving up rights would be if he had some specific product identity, and we assume that that can be easily changed. If you have an article inspired by your own setting, just file off the serial numbers, and there's no loss to you.
However, if you prefer not to submit articles under these conditions, we won't object.