I know a few people who post on DhO took part in Dr. J.A. Martin's psychological research on enlightened people. Some might have heard the buddhist geeks poscasts on the topic see Ep. 1 and Ep. 2.

The full text is out...
J A Martin - Dissertion on Enlightenment

I assume the non-symbolic consciousness stuff will be familiar for most people here, for more details on the stages of ego development that the study talks about see here...
Ego Development