My interests tend towards process philosoph/theology; which has a lot to say about panentheism. The following is a short section from a paper I wrote on how God acts in the world. (also, see the the book by Clayton and Peacocke)
Process thought rejects concepts of a distant, unengaged God in favor of a God that is everywhere present in the universe and experiences the universe. This is through and through a panentheistic ontology (Clayton and Peacocke 2004) and gives us a first hint as to how God is able to act in the world by virtue of God's imminence in it (Peacocke 1993, 157-160). In all panentheistic ontologies, the universe is said to be contained within God. Such theologies are motivated by the desire to explain the simultaneous experience of God's imminence and transcendence.
This belief is found in many of great religious traditions of the world. In Hinduism, which has been informed by millennia-old Indian philosophical thought, we find the teaching that the Self is intimately associated with the Absolute. This is expressed in the Chandogya Upanishad, the most ancient of the Upanishads, where it is proclaimed: "Tat tvam asi", That art thou (Radhakrishnan and Moore  1989, 69). These thoughts are the substance of a panentheistic concept of God in which we and all that is have our existence as a 'part' of God's being. Also, in Christianity we can see a panentheistic God. In the verse below, we find Paul quoting the philosopher-poet Epimenides and telling us of the human quest for God: "They would search for God and perhaps grope for him and find him - though indeed he is not far from each one of us. For 'In him we live and move and have our being'." (Acts 17:27-28)
It has been argued that panentheism is not only consistent with humanity's experience of God but is what ultimately allows for the experience of God (Borg 1997, 32-54; Peacocke 1993, 157-160) .
Borg, Marcus J. 1997. The God We Never New - Beyond Dogmatic Religion to a More Authentic Contemporary Faith. San Francisco: HarperSanFranscisco.
Clayton, Philip, and Arthur Peacocke, eds. 2004. In Whom We Live and Move and Have Our Being - Panentheistic Reflections on God's Presence in a Scientific World. Grand Rapids, Michigan: William B. Eerdmans Publishing Co.
Peacocke, Arthur. 1993. Theology for a Scientific Age. Minneapolis: Fortress Press.
Radhakrishnan, Sarvepalli, and Charles A. Moore, eds.  1989. A Source Book in Indian Philosophy. Princeton, New Jersey: Princeton University Press.