The owners of Boca have called off their offer to serve lion tacos because of threats.
From Boca's Facebook page:
Due to concern for safety of our families, customers, vendors, and friends we will not be selling African Lion Tacos on Feb. 16th, 2011. We will continue to bring unique and creative menu items, but not at the expense of safety.
Pre-orders will be fully refunded at the restaurant or by calling (520) 777-8134. Thanks for your support.