Mix is a very interesting game inspired by 1000 Blank White Cards. The basic rules (card acquirement, turns and so forth) are very similar, but the cards of the deck can be any cards from any games which use cards, from Magic - The Gathering to Monopoly. Even standard playing cards are permitted!
All cards can interact with each other, and a game can be won in any way that the game any one card in the current game was originally part of used as a winning or very, very good condition. This means that if you have at least one playing card in the current game, you can win with a five-of-a-kind. Likewise, you can also win with a certain number of points, as far as all 'connected' games are concerned.
The Nomic-ness of this game is that the rules can differ greatly from game to game. The difference is that the players don't make the rules. Real game designers do.
The full rules of this game can be found at 
http://www.gamegrene.com/game_material/i_want_my_1000_blank_white_cards.shtml.
