How can I write a plugin for FeedBurner’s Standard Stats

As you know FeedBurner is offering a free statistics service for tracking the site/blog stats, not only for the feed.

It’s really easy integrate it in wp themes but it require to edit the theme to add some javascript.
I would like to write a plugin so even a newbye can do it without editing the template. (This will be the first plugin I wrote)

The feedburner stats require to add the javascript to any post.
My plugin could offer a template tag that the user have to add to the template, this is easyer than adding the javascript but require again the theme editing.

So I’m wondering if there is a “post” hook like the wp_footer o r wp_head that allow to add content every time a post is shown.