I heard her unequivocally state last night on the Fox panel that her husband is working for the Romney campaign.
You are right, her husband was a McCain media advisor but has switched sides and is with Romney now!
http://www.onthemedia.org/transcripts/2007/03/30/03
“Socializing between reporters and the people they cover is part of the D.C. landscape. But when they actually tie the knot, are journalists in an ethical bind? We asked Fortune’s Washington Bureau Chief Nina Easton, wife of John McCain’s media advisor.”