This template comes with a slick, built-in mootools-based tooltips script! Just assign a link or image with the class "Tips2" and you can create a cool hover tip with title and description areas like this:

In the above example, here's what the img tag looks like:

img class="Tips2" title="Mootools Tips :: Want some milk with that javascript?" ...

The same works with a hyperlink, like this: Join Pure Joomla!

The tips are easily styled in the template's css.