I realize that a lot of the personal information that was obtained can be gathered through other means (yahoo, google, etc...) but those parties don't use your personal access to gain it.

The list itself doesn't concern me so much as who's hands it is in. I don't fully trust big internet companies but I trust them a lot more than I trust someone who'd use a username and passsword that doesn't belong to them to get ahead in a text based game.