touch -t [[CC]YY]MMDDhhmm[.SS]] FILENAMEUsed in conjunction with wildcards such as * or *.jpg for example this can make it easy to get photos imported with the proper dates.
This can be quite useful for changing the file dates on files that were burned to CD at a date much different than when they were shot. Fine tweaking of the time will impact the way the photos sort if you sort by date.
From my experience you can't simply move photos within iPhoto's structure. If you get them in with the wrong date you'll have to copy them out to another folder and then re-import them.

