In my installation the accessorials were being rendered beneath the Order Notes section of the form for customer information.
I’ve hacked it up, you can create a function in the Arras theme functions.php file with a nearly identical function from the Sharedaddy service class file. I posted how I did it on my blog
Circuitbomb.com – Adding Jetpack Sharedaddy to the Arras Theme
Its not much and might be a bit of a dirty hack, but my buttons are in my posts now. 😉
This is great, however it only puts the category slug into the body class
<body id="top" <?php if (function_exists('body_class')) body_class('category'.$class ); ?>>
to so it inserts category-slug