mmllr,
I take Neurontin 300mgs, twice a day. I've been taking this dosage for about 2 months. Apparently, when you start this med, your doc should start you on a lower dose and then slowly increase it. Originally, I started on 100mgs once a day, then 300mgs once a day and now I'm on the 300mgs twice a day.
Personally, I don't think it has done anything to help with my pain. But, like Piercings said, don't let this discourage you. Everyone's pain is different and what works for one person may not work for another. Also, I don't know how long you have taken it, or if you've had any side effects from it. My mom had to take it a few years ago for shingles, and she said it made her feel crazy. Of course, this is the woman who can get high off a Tylenol. But, that's a whole 'nother story.
Anyway, there are a lot of us who do take Neurontin, and again, like Piercings said, some swear that it works wonders. Hopefully, some of those people will post and you can get a full spectrum of opinions. Good Luck!