Unfortunately we have to wait for a confirmation before displaying the balance because with zero confirmation balances, a player can make a slow confirming deposit, play and if he wins, he can wait for the deposit to confirm and cash out the winnings. If he loses the money he can instead make a double spend with higher fee and essentially get the money back once the second transaction confirms.

What we will do however, is adding the unconfirmed balance so that it's visible immediately after depositing.