Double Spends

[optimator]

blockchain.info shows a list of double spends - http://blockchain.info/double-spends][url]http://blockchain.info/double-spends[/url]

Are these double spends that have been attempted or that have made it into the blockchain? Does anyone have a number for how many BTC have been added in excess of the fixed amount determined by protocol because of double spend transactions?

[Rothgar]

All double spends never have both spends confirm.  So no bitcoins have been added to existence.  There is the risk that if a payment is sent that is double spent then the original receiver of the funds will not confirm and the payment won't go through.