There are plugins that can do this automatically for you. No need to modify the code. But if you wanted to all you need to do is add the code to the loop.php file but make sure to surround it with a conditional tag so it only appears on single posts.

http://codex.wordpress.org/Conditional_Tags

Thanks for the reply, I was able to add it to the loop.php without using the conditional tag. Looks good at http://mtnweekly.com Are you really suggesting people add more plugins? I thought the idea was less is more?

Some people are not comfortable with manually changing the code so that is why I suggest using the plugin.

Any plugin you recommend?

I don't really use plugins for this sort of thing so I suggest reading up on the topic and looking into the votes in the plugin directory to see which might be best.