That’s strange, it is a page within the demo site though. If you go to the demo page, then to features > tutorials > front page widgets. That’s the guide to setting up the front page content.
This should be the direct link – http://www.redfactory.nl/themes/therestaurant/2011/06/22/frontpage-widgets/
There’s a widget set up for the front page content already – http://screencast.com/t/31itzCWb8