I bought a pack of Christmassy stuff today and there were some embossed cards included. Let me see if i can find an image so you can see what i mean...
Here they are: http://www.trimcraft.co.uk/productinfo.php?product=1813 but obviously where the gifts on the cards look black in this picture they are actually just embossed IRL.
How do i use them? They take up loads of space on the card, so i don't get it.