Just a note to UK readers that Hackvision is now available at Cool Components.
http://www.coolcomponents.co.uk/catalog/product_info.php?products_id=606
They even put together a "super bundle" that includes all the extras to help you really start hacking!
http://www.coolcomponents.co.uk/catalog/product_info.php?products_id=607
More international distributors are coming very soon.