Hi Brian,
Fascinating post. Even though I am a very spiritual person, I have not really ever been able to define just what spirituality "is". I can define what is to me. For me it is a sense of being as one with the cosmos. A connection to another plane of existance outside of the physical.
I feel that spirituality is so hard to define, because for each person it is experienced differently. I also feel that religion is a way to express one's spirituality. I do not think the two are one and the same. For while I am a very spiritual being, one would be hard pressed to describe me as religious.
Just some food for thought