I'm starting to look at the different diets myself. I met with a nutritionist yesterday and talked with her about different diets. I'd caution you to stay clear of any diets that offer to "cure" your disease.
I just ordered a new book from amazon.com yesterday that had 75 recipes for MS patients - it was on clearance for $7. When I get it, I'll go through it and give it a review. I also have the Swank diet on reserve at the library and I am waiting for it to be delivered to my local branch.
One thing I talked about with my nutritionist yesterday is that taste plays a big component in any diet. You can find the "best diet in the world" but if you don't like the taste of it, you're less likely to stick with it.
We also talked about supplements and how they are secondary to having a balanced overall diet. One conclusion that we came to was that I should change the timing of my vitamin D3 supplement. Vitamins A, D, E, and K are "fat soluble" vitamins, so you need to eat them at a time when there is some fat being ingested or already in your system. I've been on 20,000IU a day and my low vitamin D 25,OH level hasn't budged a bit (it actually went down a point, but that could be due to machine calibration). Therefore, I am changing it from taking it in the morning (where I eat a very low fat breakfast) to dinner time, when my meal contains more fat.
On sort of the same idea, it's important to document what you've eaten and how you have felt afterward. My therapist introduced me to a great journal (as it's really important to journal how you feel every day - especially when it comes to applying for any type of disability insurance later on) called "memory minder", or now I think it is called "health minder". It has an outline of a body for you to shade in any areas that are bothering you that day, a place for the day's weather, your diet for that day, and a listing of different body systems so you can write any symptoms you are experiencing. I just ordered two of them from amazon yesterday, too, as they are on sale right now for $14 and change. (Each book is good for three months' of journaling.)
So to sum it up, (and admitting that all of this is relatively new to me and I don't claim to be an expert in any way), I think you need to find what works for you - and it may not be one particular set diet but rather "a little from this one, and some more from that one". By journaling, you'll be able to see if there's a trend of you feeling worse after consuming certain foods, and then you can eliminate your "trigger" foods from your diet.
I hope that helps! Best of luck to you!

jenn