You need to embed some presentation on your Joomla site? Well... you can do it with the component & plugin JEmbedAll. Just upload the document on Prezi then embed it adding into a Joomla article, module or script the following text [ prezi = http://prezi.com/1vno843ijfdz/presentation-tips/ ] without the spaces. Just replace the URL with the one you needed to see your document online.
In the administrator section you can edit this string - you can change its name and the CSS code attached. Using the CSS code you can set the width and height of the embedded presentation, the position and other attributes (like the margins). The JEmbedAll configuration section contains a form that allows you to set more details about how to view your presentation.