From the website of the Summit, NJ Dominican Nuns:
What is a Dominican Nun? Like all contemplatives, our specific mission is unceasing prayer for the entire Church, a spiritual service in the form of praise, adoration, intercession, expiation and thanksgiving. By profession, we are wholly consecrated to the Church and are called to the task of spreading the Kingdom of God in the world, using only the means of prayer and penance, which are endowed with a marvelous hidden apostolic fruitfulness. We hold in our hearts the sufferings and anguish of all, and are a sign to believers and unbelievers alike of the existence and presence of God, affirming the transcendent values of the life to come. By our hidden life we proclaim prophetically that in Christ alone is true happiness to be found, here by grace and afterwards in glory.
Contemplative activity at the service of the Church is the definite pattern set by St. Dominic for the Nuns of the Order, for he founded them ten years before the Brethren to offer their prayers and penances for all “preachers of the word.” From the very beginning of the Order, St. Dominic associated us with “the holy preaching,” through a life of contemplation, liturgical prayer, work, and sacrifice. He founded the nuns before the friars, knowing that the success of his preaching depended upon and was linked intimately with the intercession of his daughters.
Our life is apostolic and universal in scope, consisting, according to the Dominican ideal, in giving to others the fruits of contemplation: “contemplare aliis tradere.” Yet, the ultimate end of the Dominican contemplative nun―to live by God alone and for God alone―while it embraces our personal sanctification and the apostolate, nevertheless transcends them both. It is transformation into Christ through Love.
They also have a blog.