While Mayor Quan is on her way to China, we back in Oakland are celebrating another first: Oakland’s Battle of the Taco Trucks. Saturday night from 7 p.m. until midnight at the Oakland Convention Center downtown. Tickets are $15 in advance/$25 at the door. But I think the price only buys you access to “great cheap tacos.” The key word is access. The actual tacos — and tequila — are extra. But you can call 510-466-6415 or email firstname.lastname@example.org. Let the battle begin!