Link One: Flavors of heartache.
Link Two: Making the Grade: Why the Cheapest Maple Syrup Tastes Best
The first link is one post from one of my favorite webcomics: Indexed. Jessica Hagy posts all these hilarious and/or thought-provoking graphs and charts on index cards. Check it out.
The second link is an article from The Atlantic that will not only teach you some things about maple syrup, but about food labeling in general. Worth a read.