Watch for the Light: Readings for Advent and Christmas compliled by Plough Publishing House. It contains a meditation for each day of the Advent season and is easy to pick up and put down as time allows. The complided authors include Bonhoeffer, Eliot, Lewis, and Yancey among many other wise sages.
Senses of the Soul: Art and the Visual in Christian Worship, by William Dyrness is really making me think. It combines historical fact with contemporary research adn observations. It seems like it will be a great springboard for discussion in churches seeking to begin, expand, be more sensitive to including the visual in Christian worship.