The form is not really build it. It's an optional plugin that as most need that you add their function to your theme itself (as stated on the plugin backend page on top). See the theming tutorial for custom pages. Create on name "contact.php" for example. Then add the printContactForm() function to that page and create a link to it.
The nightly builds however have an optionally contact page by default.
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The nightly builds however have an optionally contact page by default.