Why are you asking for my email address? The only reason I'm asking for your email address, which isn't required to submit a comment, is to provide a gravatar if you've created an account for yourself and associated your email address with a small image. If you have a gravatar created for the email address you submit, it will appear next to your comment. Otherwise nothing will appear.
What is a gravatar? A gravatar is a "globally recognized avatar." You can get more information about gravatars, as well as create your own for free, at www.gravatar.com. You can also view my gravatar here.