As of May 1, American Airlines has discontinued its 'meeting' discount program (where the carrier had offered a discount for 10 or more travelers flying into the same destination from different origins on/around the same date range). The 'new' American is following the policy of US Air where no such programs had previously been offered. American will continue to honor current discount meeting agreements, but no changes to existing agreements will be permitted.
At this point, the 'new' American will continue to offer discounts where groups of 10 or more are traveling together on the same flights.