A few people have asked me what the sacro-iliac joint is. I found a somewhat decent link here: Sacroiliac Joint Pain.
The belt really is helping. It's definitely much easier to get up from a sitting position and it's less painful overall. I hope I don't have to wear this thing for twelve weeks though. I won't make that decision as much as I might want. My chiro or someone else that can actually examine me will.