Hell Why not!
For those of you new to the art, here is how it works.
A list is formed showing all the cards in the deck, each person puts their name beside the card they will make (you can do more than one but it makes for a much more interesting deck if you wait a while till you have 78 people. the decks this diversity produces is lovely!).
When all the cards are assigned, a date is agreed to make them by. You can use any medium, but for a deck (unlike other types of ACT/ACEO) they MUST be flat,and fit the right proportions (2.5x3.5 ins).
Each person makes 78 (yes that's 78!) cards. this is where it is a good idea to make digital art/scan one image in and make copies of the same piece. The reason it is done this way is that cards are traded,not sold; a piece for a piece.you want a 78 card deck? go make 78 cards.
Your lot is sent to the co-ordinator, who then puts each deck together. The assembled decks are sent to all the contributors. Presents all round!
However, if you would rather do several peices per person, say three each, you have less diversity, but also only have to make a third of the copies.
Ready to go?