I really enjoyed the Roll20 seminar at Gencon, and was struck by how much y'all wanted to make sure Roll20 was compatible with every system under the sun. I've been wanting to get into Fortune's Fool, which uses a Tarot deck as a resolution mechanic. One of the things certain characters can do is go through the deck, pull out a specific card, add it to their hands, and then re-shuffle the deck without shuffling the discard pile back into the deck. As Roll20 stands now, I don't think that's possible; I don't think you can either go through the deck to pull out a specific card or shuffle the deck without shuffling the discard pile back in. Just a thought. :)