I just noticed this port - great to see that the Drupal module has been able to work for WordPress as well.
I've made quite a few updates to the module, including moving from the Bespin editor to the new Ace code editor.
The other major new feature is LESS support for live LESS editing in sites.
If the maintainer is still interested in updates, it may be worth bringing some of these through into this WordPress module. There are also quite a few bug fixes which would improve stability of the module as well.
The new code is at the Drupal project page for anyone interested in doing this - http://drupal.org/project/live_css