Getting other groups involved? There must be other groups out there that would be interested in doing some good. I've just got in touch with the good people from 'Join Me' who have shown considerable interest - this could really bolster our numbers, particularly in the UK. If anyone else can think of any similar groups then please post details here or contact them directly. You never know, a fellow Anon might also be a member of the group you're thinking of and the word of an insider will have significantly more impact.
Well, any gay movement really, religious groups to some extent, political organizations might work too. Book clubs, philosophy classes/circles etc.