Lol, he's special so he has lots of stuff in his Avatar. Go to your settings, you can add things too. Welcome to Crackberry
I'm not THAT special! Anyways, to access your settings, the quickest way, is to use the Quick Links, on the Forum Tool Bar. Click on Quick Links, then Edit Your Details. From there you can input your device model, and pin, BUT some of us have gotten clever in those fields. You will also find Edit Signature under Quick Links, if you want a custom siggy.
EDIT: Actually looks like you found the signature area.