Ah, the old double edged sword - good news and bad. Good news is always wonderful, but as you well know, it's so frustrating when they don't know the cause of your pain.

I don't know if this will help any, but National Public Radio (NPR) is doing a series on back pain. Here is the link to the series of reports. http://www.npr.org/templates/story/s...toryId=5251891
It's an ongoing series, so you might want to check back now and then to see new articles. They also have some links to organizations that might offer some helpful info also.

I'm just so sorry you're having to deal with all this. I guess the good news is it's not MS, but if it's not then what is it?