Only one.  An old friend from high school seems to have gone down that route.  But I know of no others, even among some very religious friends or acquaintances here in Texas.  My gut feeling is that (at least for now), it's a big enough issue to be a minor concern, but it just doesn't have the numbers and may never have the numbers behind it to be much more than an annoyance.  I don't see it overtaking more "regular" religion at this time.