You'll notice too, that as of Feb 7th, the Amazon product description doesn't even say WHICH interchangeable lens comes in the box, just that it is a 3X zoom. I assumed it is the 18-55mm lens but there's nothing on the product page to confirm it. This is a poor product page for Amazon, which is unusual for them.
Yes, it has a basic built-in microphone, but for best sound you need to buy another one. However, I'd recommend not going with this camera as the quality of the camera is questionable and the warranty doesn't cover almost anything. I bought the Nex-5 and have really regretted it. How about having a look at the Lumix GF-1, or Olympus E-PL1?