I’m also trying to get this working – I’ve noticed that wp_list_cats() generates the list of categories and sticks each category description into the title of each link.
So, somewhere in the wp_list_cats() function in wp-includes/template-functions-category.php there’s a bit of code that we can surely adapt to be a simple print_cat_des() function, right?
[ I have almost no idea what PHP’s up to, so why it’s not possible to swop a few words from this hack is beyond me… ]
Line 186 in template-functions-category.php defines category_description($category = 0), but that seems to be doing naff all – how about down on line 343 where it uses
$link .= 'title="' . htmlspecialchars($category->category_description) . '"';
to put in the title for the category link? But I have no idea how to mung this into a workable function. Little help?