Well, I just tried it (iPhone to iPad with CCK) and that'd be a no. The iPad's iFile did not "see" the iPhone. You can see the photos in the iPhone's Photo app - but you could before a jail break (of either device).
So, maybe some day? I'm sure there is a lot more programming and such running under the hood of iFile - but maybe an e-mail to the developer may reveal more answers?
Marilyn