Image Show near Boston in Spring of 2007?

A couple of folks at the PHSNE show in Boston have said things to me along the lines of, "The PHSNE show is great, but is stongest for hardware, not images. If you want images you need to go to the image show. It happens in a hotel (off I-495?? outside of Boston) every spring."

Does anyone know what show this is? I have looked it up in the various search engines but I must be missing something obvious. Any help much appreciated.

Thanks, Jon