Well I may only be a fifteen year old stage magician, but I do have some good ideas. First of all, as I said, we need some new illusions. Not only that, we need some new and innovative methods. Sure illusions builders and designers are doing a wonderfull job of this, but I believe that the magic community in general can help too. Draw a scematic diagram or a bluprint.
E-mail it around, and see what other people think.
You may not have the money to build it yourself, but sooner or later it will end up in the hands of someone who does. You don't have to know a lot about the field of Illusion to have a good idea. In closing I would like to say, If you have an idea for a new illusion, get the word out. See what other magicians think. With some modification it might just be the next Zig-Zag or Asrah.