+1, could you post your patch? My budding startup idea's blog is powered by a WooTheme, and I have a conference this week, so I'd rather deal with this sooner than later.
I'm not sure how WooThemes uses this file, but you can require a user to be logged in to access it fairly easily. This might break some part of WooTheme's functionality.
If you happened to move your wp-content directory[1] this exploit is not going to work on you. The `require_once` statement above relies on wp-content existing so it can find `wp-load.php`