I have recently admitted to my husband about the desire for polyamory. And ironically, also recently started attending church again after a 7 year absence.
So I'm very happy about this thread. It is wonderful to know there are other Christian polys. I would say I express my spiritual-self through Christianity, but not exclusively as there are elements of natural-world paganish tendencies in me to (as in I greet trees as equal beings and give them hugs).
This journey into polyamory is going to be an interesting one! And definitely something I will be keeping in the closet (unless directly asked) within the Christian community for now.