Thanks for posting this - after some of the discussion over the weekend I was about to ask the same thing. My symptoms started with stiffness, fasciculations, and tingling. This progressed into cramping and possibly myotonia. (This lead the first neuro I saw to test for Muscular Dystrophy.) Then the feeling of weakness and heaviness in the legs. Most of these things started to clear up when I went on Gabapentin. Then the foot burning started.
It is interesting that quite a few others seem to have developed fairly similar symptoms to what I did. Yet, three neurologists including two neuromuscular specialists have said they can find no neurological cause for my symptoms.
I think a lot of you know just how I feel right now. Its frustrating and scary when you know something bad is going on inside of your body but the Doctors can't help you or don't even feel there's anything wrong with you.