If you installed wordpress.com stats plugin you can easily bring your site visitor status to front page. Copy the code below and paste where ever you wants to show.

php
$post_stats = null;
$views=0;
if ( function_exists('stats_get_csv') )
{
global $post_views;
$post_stats = stats_get_csv('postviews', 'days=-1&limit=-1&summarize');
foreach($post_stats as $posts)
{
$views+=$posts['views'];
}
echo "Visitors:".$views;
}
?>