Excellent work

Brilliant plugin.

I had this up and running in 15 minutes.
Note you will need to adjust your WP_Query functions, but it provides you with the code snippets you need ? very handy!

For example I use the following to provide a custom post sort order by taxonomy:

$category_name = $post->post_name;
$args = array(
?post_type? => ?project?,
?post_status? => ?publish?,
?posts_per_page? => -1,
?order? => ?ASC?,

//?orderby? => ?menu_order?, //old code
//?category_name? => $category_name //old code

//New sort order by term:
?meta_key? => ?_reorder_term_category_?.$category_name,
?orderby? => ?meta_value_num title?

);
$projects = new WP_Query($args);

A gotcha is to ensure you have ?Sort by? set to None for the menu order arguments found within Settings ? Reorder Posts, otherwise it will ignore the custom sort order.