I've joined in on a swap over on BlueBazaar and am a little too excited to wait till mail out day to show what I've made.
The first time I heard about Moo Cards was over on Flickr. But it seems they are also in the scrapbooking world sort of like an ATC (Artist Trading Card). The Moo cards are only 2.8cmx7cm big. They are like little mini works of art.
Mine are digital since I find that the easiest to do collage with. I just love mucking around with my little PSE2 program! :)
I've got to make 8 of these but they only really took about 15minutes each so I could make heaps and heaps so easily! Love them!