<?php
// Fetch the next node id from the readpath
$next_id = readpath_get_next_nid();

// Get the page # and comment id if any
$link_info = readpath_get_link_info($next_nid);

// Make a link straight to the first unread comment on the node
$link_to_next_unread = l("View first unread post", "node/$next_id", NULL, $link_info['query'], $link_info['fragment']);

print $link_to_next_unread;
?>