Neurontin did to me much of everything mentioned above. I got the swelling of the lower extremities, which didn't go away after I stopped the drug. I still swell there, and am about to be evaluated for kidney function to see if my kidneys have been damaged. I've been off the Neurontin for over a year. I went to Topamax, which works just as well without any side effects for me.
(By the way, I took it for neurogenic pain.)
One thing I've not seen mentioned though, is rotting and brittle teeth. Mine went really bad. I had to have several caps replaced, and several caps put on, and also had to have three different root canals duing my Neurontin use.