Kathryn Presner on "[Theme: Superhero] Can the footer be customized?"

While Superhero doesn't have a footer widget area, you could add one to a child theme if you like.

I'd recommend that over hard-coding your map and other info directly into the theme, as it'll make it much easier to update in the future.

Creating a child theme means that your tweaks won't be overwritten when updating the theme. Here are some guides in case you haven't made one before:

http://codex.wordpress.org/Child_Themes
http://op111.net/53/
http://vimeo.com/39023468

Here are some resources for adding new widgetized areas to a theme:

http://codex.wordpress.org/Widgetizing_Themes
http://www.dummies.com/how-to/content/how-to-register-new-widget-areas-to-your-wordpress.html