Ciao Bambino is great resource for hotel, resort, and property recommendations, when you travel with your kids.  All of the accomodation reviews highlight the features that parents are often looking for when they travel with kids, like cribs and bassinets in rooms, open spaces, nearby kid friendly attractions, etc.

While we have never booked a vacation property through them, the next time we travel, I will look into their site for recommendations.  The vacation properties listed are geared towards international travel, Europe in particular, but they also have some property reviews in the US, and the Carribean islands.