I came across these great guides to learning all about anamorphic-enhanced widescreen format as well as a primer on film aspect ratios in general. I enjoy articles that cover everything in brief detail over one subject like these do...

In the pages that follow, you’ll learn EXACTLY what anamorphic widescreen on DVD is. You’ll discover how it works and (more importantly) you’ll learn why you should care about it. We’ll also give you a primer on film aspect ratios - how they came to be and what that means for DVD. My hope is that by the time you’re through reading this, you’ll know everything you need to know about the subject. And whether you own a widescreen TV or not, you’ll want to call, write or e-mail the Hollywood studios, and insist that all your favorite widescreen movies on DVD be anamorphic-enhanced.

Article: The Ultimate Guide to Anamorphic Widescreen

Article: Widescreen-o-rama All About Aspect Ratios (And Why Widescreen Really Is Better)