SBC does not give out that information as to when and where RT's are deployed. There has been much speculation on what factors are used to convince SBC to install a Remote Terminal - but in the end no one is sure and the folks that know are not saying.
The best recommendation is to continue to request DSL service at regular intervals, and have others in your unserved area who want DSL continue to request service as well. It is assumed that the expense involved in installing an RT needs to be covered by enough demand to make it profitable to install. That said, RT's do not go in overnight - they usually involve substantial engineering work and lead time.
So the short answer is it is presently impossible for us to predict when SBC will install an RT or provide DSL service in any given area.