Actually, if you keep renewing ScoreWatch, they're viewable for a lot longer than that -- I have reports going back to October 2004.
I have MyFICO Identity Theft Security Deluxe reports going back to Feb 2005.
It says a year from the renewal date, but they do stick around if you renew, which is incredibly cool.
I know you guys probably hear this a lot, but I'd really love something, anything, to help monitor Experian. I'd probably dump my other products from competitors.