We can offer people a set of default avatars to use, if they don't have one to upload. If everyone could post links to images that would work as avatars (faces from the movies, symbols, stuff like that) I'll crop them and add them when I have the time.

Like this?

Or this?

And even this?

I like this Grevious fellow, he knows what I'm talking about.

People can also make up their own avatars.

Like your wonderful MS Paint creation.