A busy AA forum is COFWA at
health.groups.yahoo.com/group/cofwa/
I believe some AA patients of Dr Aldrete are getting the spinal cord stimulator but any invasive procedure carries the risk of making AA worse. Haven't heard much good things about the pump for AA though.
I had a bike accident 30 years ago and have had back trouble ever since. 2 recent back ops made my pain worse and finally was told i had AA .
There is not much good news about this disease i'm afraid, make sure you get a good pain management Dr and have a read through some of the info Doc Sarah has on this site, it is excellent.