I know it is against the TOS but in theory is the information in a Yahoo Account changeable to reflect another owner (SSI, Name, Address, etc) and a another site?
Nope, once the info is entered, you cant transfer it Check out my thread for YPN invites with no info in it (fresh invite) http://forums.digitalpoint.com/showthread.php?t=109184
It was a huge hastle when I transfered one. The checks got sent to the wrong place for months, even though I called them several times.