I know many Anglicans, including Rev. Dr. Canon James Wong who
speak in tongues (I'm quite sure he doesn't mind me quoting him).
You can evidently see this at FOP, an annual event for Singapore
Christians.
A former Methodist bishop I know, speak in tongues too.
Its not true that only 'megachurches' speak in tongues. More
than half of Christians today speak in tongues, all over the
world.
There're many misconceptions about speaking in tongues. Speaking
in tongues is the allowing the Holy Spirit to pray through you. You
can start/stop at your own will, but it is allowing the Holy Spirit
to use your mouth to pray through and for you.
Tongues was introduced in Acts 2 on the Day of Pentecost and the
early church apostles taught about tongues and encouraged the
praying in tongues.
Its not a psychological thing...nobody gets hyped or tranced
into it...that's another kinda flaky crazy 'christian' thing that
causes some of misconceptions of tongues. that's another
story...
Lets say praying in tongues is a miracle, what purpose does it
serve? It is not as if god only speaks one language. If it was to
draw more to christianity, god should have done something more
obvious. At some hindu festivals people walk on fire without
getting burnt, proof of their god? Others claim to know a place
very well, with proof, though they have never been there before,
proof of reincarnation? My point is that if one accepts such
religious stories wholesale, then one must explain the "miracles"
that happen with people not of the faith. Either that, or the mind
is more powerful than we think it to be