I also suggest:
The Neuropathy Association's index of neuropathy at
www.neuropathy.org (I'm not fond of the way the Association often handles itself, but the databse of papers about neuropathy types is useful)
The Poncelet protocols for neuropathy diagnosis at
http://www.aafp.org/afp/980215ap/poncelet.html
Dr. Latov's clinical paper on serum testing for neuropathy at
http://www.questdiagnostics.com/hcp/...eralNeurop.htm
Dr. Alan Berger's (from Jacksonville Shands) neuropathy summary at
http://www.dcmsonline.org/jax-medici...uropathies.htm
And Liza Jane's spreadsheets at
www.lizajane.org
Those interested in studying certain causes in more detail can go to such places as Rose's B12 website and the Gluten File.
I love Washington University's neuromuscular database, and have spent many hours there, but I have heard complaints that it's very technical and written in doctor-ese shorthand, and that's not easy for everyone to get through.