SanDiegoFreelance - 9:44 pm on Mar 14, 2011 (gmt 0)
I would assume a number of them. SafeSearch would be one of them.
Since they are constantly working on the algos almost necessarily each algo would need a test list starting with a seed list. They would also need a white and black list to test against.
The panda list is likely their latest list? Maybe a panda exception list is in the works?