All you have to do is the following:
1. Be an AT&T home phone customer (If you don't have home phone, you can still have DSL, then it is $20 a month, same speed).
2. Order DSL service online (only online will give $10 a month).
3. Cancel your home phone.
In this case, you have to buy your modem.
Or, you can have a free modem from AT&T and have $250 rebate if you do the following:
1. Order cable internet, the cheapest possible.
2. after receiving the first bill, call AT&T and order one of the higher speed DSL internet and get a free modem or wireless gateway and up to $300 in rebates. See link for special offers.
http://www.bellsouth.com/consumer/inetsrvcs/inetsrvcs_special_offers.html
3. As soon as AT&T DSL is working, call your cable company to put your service on "Vacation".
4. Wait for all your rebate from AT&T to come back, then cancel AT&T DSL.
5. put your cable internet back to use. Order AT&T home phone.
6. Wait 3 months then use your home phone number to order the $10 DSL internet online (after 3 months, you are considered a new customer again) then you can use your old modem from AT&T
7. Cancel cable internet and AT&T home phone.
8. now you have AT&T DSL for $10 for the rest of your life.