Now Facebook allows you to use your face or someone else's face as an emoticon while chatting with your friends.
Here is how you can insert your face as an emoticon in Facebook chat:
Go to any Facebook profile, official page or event you want to use as an emoticon. For example: //www.facebook.com/kapilbjindal.
Enter Username in Double Square Brackets cio [[kapilbjindal]].
Enter it in a Facebook chat and you will see it as an image of the person's current profile or page.
Now surprise your friends with this new trick.