nope, but you can improve the.. err "seo-score" of your blog by adding images..
1) name your pictures like this: "your-key-phrase.jpg" (use hyphens)
2) do the same in your pic's alt-text.
e.g. if you target "fat chicks", you might want to name the first pic:
"<img src="fat-chicks.jpg" alt="fat chicks picture one">"
..thank me later.