for side sleepers like me (and @whipped guy ), I'll pimp again for a memory foam contoured neck pillow.....only about $25 at Target, I think.....don't know about that spine thing (!), but this was the best picture I could find that shows it in action....tuck one edge way up under your neck, as illustrated, and sleep like a baby.....
http://www.neckpillowstore.com/pillows/contour-plus.jpg