Question: A lot of you have little pictures next to your comments. How do y'all do that? 

Answer: That is called an Avatar.  If you click on your name at the top (or "My Q&A), it takes you to your own page.  There, you can "Edit my info", which takes you to a page that lets you pick an avatar, and change a bunch of other settings.
This question from the Yahoo Q&A forum is categorized in the topic: Education & Reference