answering myself:

These guys http://www.ionchannels.org/showabstr...?pmid=10561522 say not enough antibodies found in CSF for it to be immune, but make very good points about lack of sleep. I know lately sleep has almost as much impact as meds on my condition.
If u have trouble eating, could also be B12 problems

however, this one http://www.sciencedirect.com/science...f&searchtype=a seems to indicate that there are muscarinic antibodies involved in some cases.

Like everything else with this disease.. it probably varies from sub type to subtype.