Fixed this by doing a simple tweak. Seems as though he didn’t register the shortcode in his code…
Under the line add_filter( ‘the_excerpt’, ‘auto_sociable’ ); in the sociable.php file (found under wp-content/plugins/sociable/), put this line:
add_shortcode( ‘sociable’, ‘sociable_shortcode’ );
Shortcodes should work like a dream now ??