WordPress.com Stats stats_get_csv with custom field?

Return of that function should have post ID, right? Then it’s straight get_post_meta() using that ID and name of your field.

Update

In your second code snippet $post is global variable, $post->ID is not tied in any way with return of stats_get_csv() function. You need something like from first example ($p['post_permalink']), just figure out if there is a field with ID.

Also you don’t need wrapping if ( get_post_meta($post->ID, 'Image', true) ) that would make sense only for single current post, not for loop of posts.