Real cool intro in da Black Freethought forum man. I'm an activist with a UK group called The AIM. I tink we are doin a similar ting dat you are wantin to do man so if you wanna come and hang wit us and get any ideas or opinions on activism then come hit us up bro. We are always down to meet other anti-theistic activists and just generally shoot da shit.
Welcome to AN Morpheus and thanks for your comment. If you plan to start an atheist/freethinker group in your area I'd suggest that you first, check to see if there isn't already one and second check out what's going on in Austin. The Atheist Community of Austin is a wonderful international resource for many freethinkers.
Outside of that I'd also recommend looking into a post on your daughter's parent/teacher board or perhaps your local BOE. You can affect a lot of positive change by being involved in what the children in your community are being taught.
I look forward to hearing from you more. Please visit Good Reason News when you get a chance.