Disneyland Mama - You will be okay to borrow from your December 2008 UY Kidani points and use them towards an SSR stay in August, because it is
after May 1. New Kidani owners cannot use their AKV points prior to May 1, because this is when Kidani officially opens. So technically, we don't own anything prior to May 1 - hence, we cannot stay anywhere on those points prior to that. We could make a reservation, but it has to be for after May 1.
My AKV points won't help me if I'm trying to stay at SSR on developer points in April (for Easter break.)
hakepb - thanks for your input on this. You clearly know your stuff!