Ah, two days of searching, and I see that its been removed from woocommerce.
http://wordpress.org/support/topic/upgraded-to-204-lost-customer-login-widget-plugin?replies=4
• Fix - Removed Sidebar Login Widget. Use http://wordpress.org/extend/plugins/sidebar-login/ instead. A potential security issue was found regarding logging of passwords (since GET was used instead of POST). Sidebar Login 2.5 resolves this and the widget has been removed from WC to prevent needing to maintain two (virtually identical) codebases