In addition to David's suggestions, you could change this route to use the standard route class, and then keep the wildcard option:
$router->addRoute('item_start',
new Zend_Controller_Router_Route(
':area/*',
array(
'module' => 'default',
'controller' => 'item',
'action' => 'start'
),
array(
'area' => '(foo|bar|baz)'
)
)
);
// in your view:
echo $this->url(array('area' => 'foo', 'page' => 1), 'item_start');