Echo is now completely compatible with WooCommerce 2.0 and supports all of it's features. Now your buttons and other product page elements won't look off and will accept your color changes as provided in your theme options panel. Echo remains one of the best eCommerce themes on the market because it's responsive and is compatible with WP-eCommerce, WooCommerce and JigoShop. Have fun! More updates coming out in the next 24 hours...next one is Storefront Original.