RWW, there is also the wiki idea flying around, and ICE is considering it (yay!).
Should it happen, I will probably have a role in designing how it will work, and - if it goes by me - room for story ideas, adventure seeds and the like will most definitely be a part of it.
Maybe that would be a nice place for what you have in mind. Of course, I'm also very happy if you make it a book for HARP