You may have seen a lot of these icons floating around on reading lists. Or you have one as your user profile pic. These are gravatars.
Gravatar.com is a site that lets you set up one avatar icon that gets used by all kinds of sites all over the rest of the web. It’s a good way to stand out from the crowd.
So, if on your user profile page your icon looks like the sideways-G just go over to gravatar and sign up. You can give them a picture to use and then you’re set. (Me, I’m using the same avatar I use for Facebook and elsewhere.)
But be sure to use the same email address that you used to register with Comic Rocket though.