Adding icon to the post type

I agree. This functionality is needed.
To have something like: ‘menu_icon’ => plugins_url(‘/img/my_icon.png’, __FILE__) as part of the $args array.

I just added this to my functions.php file:

// Add new Custom Post Type icons
add_action( 'admin_head', 'cpt_icons' );
function cpt_icons() {
?>  <!--escape the regular php dillimeter to allow for regular html below-->
 <style type="text/css" media="screen">
  #menu-posts-cptnamegoeshere .wp-menu-image {
   background: url(<?php bloginfo('url') ?>/wp-content/themes/cpt-icons/iconsmall.png) no-repeat 6px !important;
		}
		.icon32-posts-cptnamegoeshere {
			background: url(<?php bloginfo('url') ?>/wp-content/themes/cpt-icons/iconlarge.png) no-repeat !important;
		}
    </style>
<?php }
?>

Then create 2 different png files in the /wp-content/themes/cpt-icons/
folder and name them: iconsmall.png and iconlarge.png.
the small icon should be 16×16 pixels and the large one 36×36 pixels.

Please remember to change the css classnames to your custom posttype.
So if you have a cpt called “projects” cahnge it to:
#menu-posts-projects

Worked…
thanks very much.