i think it means 'bf or using cloth nappies' 
actually, harecare, i think it would be a very interesting idea, not least because people could discuss childrearing ideas and practices from a gendered viewpoint...
but i'd be depressed every week because there weren't more men looking after their toddlers on a sahd basis and attending the groups. so it might be more depressing than supportive...
i don't think anyone who posts on the feminist threads can be of the opinion that all feminists have the same views. 
i think, rather than a toddler group, a 'feminist parenting' group would be more interesting. you could still bring tinies etc, but it would encourage like-minded people to look at issues concerning equality over a wider age range. ie when different issues to do with gender come up (tweens and early teens froma dress/ fashion pov, as well as independence, relationships etc)
it doesn't mean non-feminist mums are dull btw. it just means that they have different values. sometimes that's ok. but if you want to discuss parenting from a gendered viewpoint without being 'that woman who bangs on about gender all the time' and ignored, you probably have to start a slightly more specialist group. or talk to yourself in the corner. and rock slightly.