Facebook hit its numbers. But that’s not good enough – the stock is trading down 10 percent. Time to see if Sheryl Sandberg and David Ebersman can fix that. And time to see if Mark Zuckerberg shows up: Greetings! Just listening to some sunny hold music. Nice strings. Woodwinds, too. Music’s off, and we’re on. On the call: Zuckerberg, Sandberg, Ebersman. Legal boilerplate. 5:03 pm: Here’s Zuck: Stresses long-term goals. Running through MAUs. Added 3 million US users (in last month?) Focus on priorities for rest of 2012: Mobile (of course). “Building great services for these devices is essential”. 543 M actively using mobile services. (Again, from release). People who use mobile are more active than…