Based on recent actions by Apple it would appear that the next generation of iPods will be getting cameras. Rumors from around the web are citing independent verification that the iPod will receive a camera which only makes sense as an evolutionary step.
The iPod Touch seems like the most likely candidate to receive the camera as it is currently the top of the line iPod for Apple. Even more so is that the software to take pictures, record video, and edit the film is already written as the software for the iPhone.
TechCrunch is citing a source from within Asia that claims "Apple has placed an order for a massive number of camera modules of the type that they include in the iPhone. These are inexpensive cameras, in the $10 range. And the size of the order, our source says, means they can only be used for one thing - the iPods."
Macrumors has also posted up screen shots of a leaked iPod Touch case that has a hole cut out for the placement of the camera. Even more interesting is that there is also a leaked case for possibly the iPod Nano that also has a hole cut out for possibly a camera too. Remember though that case leaks are not a guaranteed source of information as there were leaks about an iPhone nano that never turned out to be true.
Apple generally releases new iPods in the September timeframe and usually runs a back to school special where buying a laptop nets you a free iPod (this is done to help clear out old inventory). Will Apple add a camera to its iPod line, probably, but which iPods will receive the camera still remains a mystery.