I did try, however, just selecting the file from the photo link in the finder browser (i.e. click browse on my site, select photos from the tool bar, and browse the iphoto database to the file I wanted). But this did not include the GPD co-ord in the file. So it seem exporting is the way to go. But this is annoying in that it changes the creation date of the file, but as long as whatever program script, website you are going to use the file with reads the date from the EXIF meta data then you should be fine.

Next Stop is to try and include the Faces info and keywords into the EXIF data.