I recently started my Photo Blog, after various considerations i choosed Wordpress for it, currently i have more than 20 photos posted on it which is not actually a big number but i found that the older images or posts will never be seen to the readers as they don't appear on the frontpage for more than 4-5 days, which created a requirement of creating a Random Link on frontpage to show a Random post to the user if he wants to and this began search for a module or a plugin as its said in wordpress.
But No Luck i found various plugins but i needed something very very simple so i thought going by the code which lead me using the following code in my header.php to create a Random Post link
$randomPost = $wpdb->get_var("SELECT guid FROM $wpdb->posts WHERE post_type = 'post' AND post_status = 'publish' ORDER BY rand() LIMIT 1");
echo '<a href="'.$randomPost.'">>>Random Image<<</a>';
The above code is quite simple and does exactly what is needed to generate a random post link for your wordpress blog.
Thanx for info.