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There's some info here: http://www.flyertalk.com/forum/archive/t-1365091.html
However there has been quite a lot of complaining about this action, just google it.
2 years, 1 month ago on Earn Elite Status: Organize Your Reward Points Before January 1
@Janet1 Complain to AA - they are the ones who forced sites like this one and awardwallet to withdraw support for AAdvantage.
2 years, 2 months ago on Earn Elite Status: Organize Your Reward Points Before January 1