Apple has placed a job posting on their website, the title of which is “Performance QA Engineer, iPad Media.” From the description:

The Media Systems team is looking for a software quality engineer with a strong technical background to test still, video and audio capture and playback frameworks. Build on your QA experience and knowledge of digital camera technology (still and video) to develop and maintain testing frameworks for both capture and playback pipelines.

There’s a strong indication that a future version of the iPad will have a camera.