Hey Rev. Gumby,
Glad you're resuming your Sunday ministry at last...
About early Christian glossolalia (I just figured out I was writing it wrong ), the best source of info is 1 Corinthians 12--14 itself (evidently much earlier than Acts). See my first post on this thread (http://www.jehovahs-witness.com/10/106903/1856394/post.ashx#1856394). But similar practices seem to have been widespread in Greek religion from ancient times down to the Hellenistic and Roman periods (Dionysos and Delphic cults, Sibyls, Hermetism and magical circles all had their own kind of "strange speech" to show "inspiration"; cf. TDNT I,722ff). Since Gerd Theissen opened the way to a socio-psychological approach of the NT in the 1980's, a number of scholars (including quite a few Pentecostals) have studied the role and function of glossolalia in the Corinthian Church. Just google "glossolalia + Hellenism + Corinth" and you'll get a lot of interesting (and of course contradictory) links.