Update: TUAW now reports that beta 3's been pulled, but it's not yet clear why. We'll fill you in more as we find out.
Update 2: iPadInsider reports that a Photos app has been added to the emulator, and there's a Camera tab in it -- possibly corroborating evidence that there'll be a camera in some version of the iPad, but more likely a tool for the camera connection kit.
Update 3: MacRumors has a couple more interesting details. Looks like there's a couple of lines in the code that suggest a front-facing camera (as often rumored), zoom, and camera flash is in the cards. Additionally, there's iPad-sized "Accept" and "Decline" buttons with video camera-related iconography. We know what you're thinking, but we still wouldn't advise getting your hopes up anytime soon. It's not good for your heart, y'know.
Update 3: ...and it's back up. Thanks, everyone!