Carbohydrates - They aren't that Simple
Louise M. Burke explains some of the complications of carbohydrates, like the glycemic index.

Glycemic Impact of Food
Dr. Ann de Wees Allen discusses the glycemic index (aimed at diabetics, but still good reading for athletes).

Glycemic Index
Janet Walberg Rankin, PhD, explain what this is and how it works during exercise; also includes a list of common foods and their index, from  UltRunR.

Glycemic Index
"Eating Carbos? Here's the resultant insulin spike." from Dr. Phil Maffetone, this index uses white bread as the standard, as opposed to sucrose; from The Maffetone Report.

The Glycemic Index
An in-depth look at the glycemic index, by Rick Mendosa.

Glycemic Index Lists
Rick Mendosa's (very big) list by food categories.

The Glycemic Index Primer
What is the glycemic index, by Peter Schroeter.

Influence Insulin with Post-workout Nutrition
A brief article from Mead Johnson explaining how what you eat can change insulin levels, and how that can affect recovery.