I heard debate about this. Apple has not made the iTunes/iPod sync interface available to third-party developers so there is currently no way for them to get in on the action. It was also mentioned that digital cameras would not be able to provide the photos in the format required by the iPod Photo, since the iPod Photo does not do its own file preparation. In fact, I wonder if it even does its own scaling or whether the sizes you see on the screen are in fact precomputed by iTunes before download and simply stored by the iPod.
On the other hand, Apple's
iPod Photo page says "Copy full-resolution photos to iPod Photo as a backup or to transfer originals to another system", so at a minimum it should have been made possible to transfer photos from a camera to the iPod's hard drive and import them to iPhoto later, whether or not they were integrated into the photo display features while they were on the iPod Photo.
Conclusion: Yes, Apple should provide a way to transfer from a camera to the iPod Photo.