mimer, good ketches... I like the second idea more, I think... probably because I can see more relation to our ancient cultures/sci fi topic and it's a bit easier to understand the meaning of the card (for me)
instinct, looking good, I agree with Irrlaeufer though, that the atmosphere was more interesting in the thumb because of the foreground..
back to sketching
edit: ah, I forgot... I looked at a couple of maya vasepaintings to see what forms of vessels they used... might be useful for the cup design (or not)... either way, here are some obviously very common shapes in a bad, rough sketch