Um, I know that. She didn't join it but she's obviously not against it.
http://www.newsday.com/news/opinion/ny-oppin044453943oct04,0,2335099.column?coll=ny-viewpoints-headlines
And:
She also said during her sworn testimony that she would not join an organization like the Federalist Society, a group of conservative intellectuals that is a leading proponent of a strict - and some say narrow - interpretation of the Constitution.
"I just feel like it's better not to be involved in organizations that seem to color your view one way or the other for people who are examining you," she said.
Chief Justice John Roberts caused a flap earlier this year by insisting he was not a Federalist Society member, even though records listed him in the group's leadership directory in the late 1990s.
Gene Meyer, president of the Federalist Society, said he wouldn't confirm whether Miers was a member, because it's "up to members themselves to say." But he said Miers has spoken to the group's Washington chapter since she became White House counsel.
http://www.realcities.com/mld/krwashington/12836996.htm