The most recent Spiritual Outlook programme on Radio New Zealand National is on digital religion and includes an interview with Rachel Wagner (Ithaca College, and author of forthcoming Godwired: Religion. Ritual, and Virtual Reality).
You can listen to the audio here (as well as MP3 and Ogg Vorbis files). Podcast link is http://www.radionz.co.nz/podcasts/spiritualoutlook
Rachel was also interviewed recently over at Second Life (after death) – Tech 24 talks religion, faith apps and video gaming with Rachel Wagner | Les blogs
Baylor University’s ‘Christian Reflection’ publication series (which is part journal, part study guide) has a special issue on the theme of Virtual Lives (including the article “Religious Authority in the Age of the Internet” by Heidi Campbell and Paul Teusner). See Baylor University || Christian Ethics || Virtual Lives to access the whole issue or individual contributions.
James McGrath points to a downloadable book of conference papers (“Visions of the Human in Science Fiction & Cyberpunk”) which includes some reflections on virtual religion. See his post over at: Exploring Our Matrix: A Long Overdue Book: Visions of the Human in Science Fiction & Cyberpunk