I live in near Atlanta in Alpharetta. I also want to share the DSL connection with other computers. My router doesnt have any USB connection either. I would see if you can get Earthlink DSL with Covad as your DSL provider rather than BellSouth. check Covad web site and see if they can provide you with DSL service. If so, some people on here have ordered their DSL via Covad with Earthlink as the provider on Covad's site.
Most external modems are ethernet based.
Make sure if you order DSL request a Ethernet based modem. In response to mdg1281 mdg1281, I'm just down the road from you in Roswell. We both consistently get 1100-1200 down and at least 200 up. And in the 8 months he's had it, I've never seen it down. Very happy with Earthlink.