Yep - I also think its a great idea but worry about making aikido have religious or political implications. Although has affected my own ethics I would like to follow Ueshibas example and not force religious or ethical beliefs on anyone. Aikido is primarily a self-defence for me, and the ethics comes out of my understanding of aikido, rather than my understanding of aikido being based on the ethics.
Saying this - I would like to hear more of how you organise this as some people in N.Ireland (often the most religiously zealous) view martial arts in a very poor light and I would consider setting a voluntary scheme by the side of aikido - but not directly related to it. (Like anything - its not the titles or classifications we give our-selves and others that matter, its what we do).