You can still access all your greeting cards, both sent and received, old and new, by clicking the link on the left hand column of your profile page. If you're using the new beta inbox you'll notice the option to view 'messages, gifts, gestures' on the left hand column then the option to view sent and received on the top right hand corner.
I am talking about all the cards and gifts I uploaded to EP. I can't find them or how to send cards. I see how to send gifts, but not cards; and the gifts are only those in your stock. All the ones I uploaded have disappeared.