So many easy ways to do this. In addition to the methods described above, there's also File/Export in iPhoto, which includes numerous options for resizing the image. Even images which haven't been resized in iPhoto can be made smaller for e-mailing in Apple Mail. Look at the bottom right corner of the e-mail for the options. But of course if you're only looking for e-mailing the image from iPhoto, you are presented with options for sizing the image when you click on the Email icon. If this could be made any easier, I'd like to know how...