You da man!

However, if it’s just that one bit you need, and you’re willing to add code yourself, you can include this snippet in your active theme’s functions.php file:

<?php
/**
 * Don't show the WordPress version nag in admin footer.
 * NOTE: Won't show WP version at all.
 */
function remove_core_update_footer() {
  remove_filter( 'update_footer', 'core_update_footer' );
}
add_action( 'admin_init', 'remove_core_update_footer' );
?>

In a future version of this plugin I may incorporate this capability, though at that point I’ll probably add an admin interface to configure what update nags to hide. I don’t want to hide them all outright out of fear someone won’t otherwise have any notice that WP has been updated. Probably would be in v2.0 of the plugin, so if you do add the above code yourself, make note of the Change Log for future updates to see if I’ve added the equivalent of the above.