address book command line tool

Back in the day, there was 'contacts', which used to work on my Mac.

I just tried it for the first time in maybe two years, and it told me that Rosetta wasn't installed. This is curious, since I haven't reinstalled my OS since mid=2010, but hey no matter. I can reinstall Rosetta when I get home, right? Right?

Anyway, it got me thinking of two things. My wife sent me an email from work, asking if I knew of a way to check her e-mail for people to whom she had sent e-mail, or from whom she had received e-mail, but who were not in her Address Book.

So in order to rustle up some grep, I need to be able to access the Address Book from here at work.

Can someone tell me if a good, reliable, sophisticated method for Snow Leopard exists?

Thanks.