Here are the rules:
When you have to push the button - 2 drinks
Each card ejected by machine immediately following a button push - 1 drink
When you get skipped - 1 drink
When you get reversed on - 1 drink
When someone steals your hand - 1 drink
When you get UNO called on you - 2 drinks
When you call UNO on someone else who doesn't have UNO - 2 drinks
When you call UNO - 2 drinks for everyone else (unless of course you were lying, then you have to down the rest of your drink)
Cards left in hand when game is finished - 1 drink per card
Annnnnd GO!
Trust me, hilarity will ensue!

/edit For those that might not know what UNO Attack is.
[This message has been edited by ryguy0885 (edited 10/26/2009 8:19a).]
When you have to push the button - 2 drinks
Each card ejected by machine immediately following a button push - 1 drink
When you get skipped - 1 drink
When you get reversed on - 1 drink
When someone steals your hand - 1 drink
When you get UNO called on you - 2 drinks
When you call UNO on someone else who doesn't have UNO - 2 drinks
When you call UNO - 2 drinks for everyone else (unless of course you were lying, then you have to down the rest of your drink)
Cards left in hand when game is finished - 1 drink per card
Annnnnd GO!
Trust me, hilarity will ensue!

/edit For those that might not know what UNO Attack is.
[This message has been edited by ryguy0885 (edited 10/26/2009 8:19a).]