carrieG, The Woodcraft Folk is a secular alternative. AFAIK, the emphasis is on 'green' issues istead. But the movement is not as well know as the guiding/scouting movement and there may not be a troop near you.
pootlepod, it's interesting what you say about the religious element depending on venue and leadership of individual packs. That makes a lot of sense to me.
My parents weren't very religious. They hardly ever attended church. I just happened to go to a church school because it was the nearest. My parents suggested I attended sunday school and children's groups attached to church simply as something to do. From 12 years onwards I attended youth clubs held in church, (but steered clear of the bible study groups).
I have a lasting respect and admiration for the leaders I met, all those people who gave up their weekends to take us places and give us a safe place to meet our friends. My life was enriched by meeting these strangers who showed an interest in us, who were fun, wise and generous with their time and attention. Even as a young child I knew they were different from teachers - this was not their job, they were not being paid for it, so they were doing it for love, not money.
I was lucky in that I had a loving family, but even so, it was wonderful to meet other adults, not connected with my family in any way, who were such good, generous people.
I really want my sons to get to know 'good' adults, good role models who are not nice to them because they are friends of dh and I. The people dh and I are friendly with are likely to be similar to us in age, outlook, beliefs, interests and stage in their lives. I think it's very important that my sons have adults in their lives who are good without being chosen by dh and I. I like the fact that my son is friendly with 60+ year olds, as well as twentysomethings who have made time for voluntary work. I think this is especially important for us as we have little extended family.
BTW I'm not suggesting this is a reason for everyone to get their children to join the guides or scouts. Obviously you can find 'good' adults leading all sorts of secular groups, but one thing I do like about the scout movement is that it attracts all ages.