There is finite (about 25) number of accounts owned by satoshidice and every one of them starts with "1dice", so there is no dificulty in identyfing satoshidice

There is finite (about 25) number of accounts owned by satoshidice and every one of them starts with "1dice", so there is no dificulty in identyfing satoshidice btw: bitcoins by default allow semi-anonymous (because all transactions are public; if you want to be anonymous you need to do some tricks) transfers.