There is no high speed at DVC HHI. I have Roadrunner in Memphis and with my acocunt comes 10 hours of dial-up from other places. I can use my RR dial-up at HHI without problems and get a good connection. Of course it does cost me 35 cents per call.
There are some "hot spots" on the island -- I believe that the Mellow Mushroom near Sea Pines Circle and the Atlanta Bread Company near the Wal-Mart are two.