Hi,
Moving the images to physical folders is a very convenient idea, but the problem is that you can (and probably do) tag one image with multiple tags - for instance: the same image can be tagged with "Trip to Germany" tag and "People/Asaf" tag so the image will be copied to 2 or more different folders.
I am trying to figure out how to add a really easy moving and renaming files feature so you can use the application to organize files on disk as well.
regarding the email, why not use the build in outlook express or Filckr options? What email software are you using ?
Regards,
Asaf.