Don't want to show your real face photo in forums face book orkut then create a avatar for your self with doppelme.
Doppelme is a Free service to create dynamic avatar. I have tried it and found it interesting.
With DoppelMe you can create a cool graphical likeness of yourself, your friends, family or any group of people for use as an avatar in forums, instant messenger, blogs and almost anywhere else on the web.
It's free and there are no Flash, ActiveX controls, downloads or toolbars needed - just your browser and a few mouse clicks. That's it!
I took 10 minutes to create this avatar for my self,Here is a screen shot of the desktop when i was creating this avatar.
It is worth a click, go an get yourself a avatar.