Let me know what kind of stuff you need, be specific about it, and I can probably make something for you. I'd say J2O is a good place for such a competition, with our facilities for level uploading and all (preview images and whatnot), so I'd definitely give priority to features that make such a thing possible.

As for the "reputation rectangles": I don't know what you mean by that, really. Please report bugs in the feedback forum if you find them, chances I find them by myself are usually not that high