I requested to add an FDR group, but the request has to be authenticated. When it's done, you should be able to search for "freedomain" on the groups page and find it. There's some options to limit group membership too, which is nice.
EDIT- I think it'll take a few days, but you can view the group and request to join by clicking on the link in my signature. If you don't have an account, it will lead you through the process, if you're interested. So far, I'm pretty excited about the prospects.