Sitemap for wordpress:
http://www.dagondesign.com/articles/sitemap-generator-for-wordpress/
coppermine photo gallery
http://www.sirjohn.co.uk/gallery/displayimage.php?pos=-1454
random page plugin:
http://www.skippy.net/blog/2004/05/27/random-posts/
http://dev.wp-plugins.org/wiki/GetRandomPage
preview theme plugin:
http://boren.nu/archives/2005/03/08/preview-theme-plugin/