--Troy Newman, president of Operation Rescue, talking about the Roberts nomination on NPR this morning
And, as that story also pointed out, Roberts's wife, Jane Sullivan Roberts, was the executive vice president of the anti-abortion group Feminists for Life. (This is also noted in The Boston Globe.)
And yes, of course he's a member of the Federalist Society, as The Washington Post notes.
(UPDATE 7/21: Er, no, apparently he isn't.)
And he worked in Florida in 2000 for the Bush-Cheney campaign in the post-election period.