As you're chatting on the forums, you'll notice a few new features.
First up is the private message envelope. Click that to send people private messages. You'll be able to tell if you have private messages by checking on The Escapist's front page, right where you'd normally log in. Right near there, you can also update your profile.
Inside your profile, you can update your vitals and such, as well as link to your own avatar. Here's mine:
Awesome, no? The image dimensions are 75x75, but try to make it look good at 50x50, just in case.
And finally, you'll notice beneath your name a title. Everyone starts off as an Anonymous Source, but where you end up from there is up to you. Enjoy!