Sorry for late reply but do you mean 2 node RAC database in Primary/Secondary mode? I.e set with max_instance_count=1. If so than there is no change compare to 9i. At least, we use it in the same way. If any particular concerns - let me know.
Does anybody know/have docs on how to do this ?
-- Regards, Ranko Mosic
-- Best regards, Alex Gorbachev