PāNu

PāNu is a great site for good information on the Paleo diet, which, in many ways, espouses the same principles as Grain Ride.  The fact that it's written by an MD lends it credibility, but more than that, I like its commonsense approach.  It has a wealth of background information on the nutritional science behind the approach, and answers questions like "how much carbohydrate do we need?".  You will find all the background information on the different types of carbs (you really need to distinguish between glucose, fructose, inulin and cellulose aka fibre, because they're all different) that you ever wanted to know.

Instead of counting calories, Harris recommends a 12 step approach.   Some snippets:

• Eliminate sugar and all foods that contain flour. 
• Eliminate gluten grains. Limit grains like corn and rice, which are nutritionally poor.
• 2 or 3 meals a day is best. Don't graze like a herbivore.
• Most modern fruit is just a candy bar from a tree. Go easy on bags of sugar like apples. Stick with berries and avoid watermelon which is pure fructose. Eat in moderation.
• Eliminate legumes

He also eats up to 4 pastured eggs a day and just 5% of his calories come from carbohydrates.  This is very different from the Standard American Diet (SAD)  - but don't take my word for it:  go check out the site for the whole story.