yeah I know what it is... just don't know what will happen to them
Anything satoshidice returns to you now belongs to Mt.Gox.
How do I find out if they returned anything?
I contacted Mt. Gox support but they say bitcoin transactions are irreversible and to contact satoshi dice.
No idea how to contact them there's no email on the site
SatoshiDice seems to be down today.
But if you win the bet, they'll send your winnings to MtGox's green address (assuming that's the green address you sent from). SatoshiDice can't be expected to reimburse you, since Gox will be the ones with your winnings.
Gox support is right that the transaction (SDICE -> Gox) is irreversible, but that's why they (Gox) should give you the winnings.
If you can find the transaction ID of your bet, put it in place of XXX here:
http://www.satoshidice.com/lookup.php?tx=XXXto find out whether you won or not, and also to find the txid of the payout from SDICE to Gox.