Further to my last post here are some useful sites for those interested in the scholarly study of the Pentecostal and Charismatic movements:
Society for Pentecostal Studies. Publishes the academic journal Pneuma.
Journal of Pentecostal Theology (academic journal published by Sage).
GloPent: European Research Network on Global Pentecostalism. Plenty of resources.
Allan Anderson's homepage (University of Birmingham, England). Lots of conference papers, articles etc.