If you would like people to be able to email you back after you leave a comment, here's how you change those settings... at least in Blogger.
Click on the Design link in the upper right hand corner of your screen.
Click on the Dashboard link in the upper right hand corner of your screen.
Click on Edit Profile, which is on the left hand side of the screen next to your picture.
This will take you to the Edit User Profile screen.
Look in the Privacy section.
Check the box that says, "Show my email address".
In the Identity section, enter in an email address.
Scroll down to the bottom of the screen and click on Save Profile.
And there you have it. Interactive comments!
So if you think I've totally been ignoring your comments lately, it's not true... you just don't have your account set to receive responses!