Ummm... I think dhanushan might have mis-intrepreted the question... I think sittingbull talks about the the "stamps" appeared in
Apple iCards postcard services (which can be used on any web browser with any OS), as you send the picture card to your friends, not the Finder icon in Mail.app that comes with Mac OS X.
Anyhow the thread you have posted is a very interesting (and useful) as well
