AT&T is required to offer a $10 DSL option to those consumers who are in AT&T's 22 state coverage area and who have not previously subscribed to AT&T DSL. This requirement is part of concessions made to the FTC so that AT&T could merge with BellSouth and take over Cingular.

Source: http://consumerist.com/consumer/concession...-dsl-270679.php