so much misinformation in here. RR and Earthlink are the same, just one is cheaper than the other. Earthlink is not just DSL, but also has cable through TWC JUST LIKE RR. You don't have to use their software if you don't want to. I have it here in Durham, NC and am totally satisfied with it. At the time I ordered it, it was $5 cheaper than RR but now I think they've gotten to the same pricepoint. I have had it go out once or twice but that was due to construction in the area. I'm billed through TWC just as if it were cable.
I believe RoadRunner was part of TWC but became a separate company and was forced to share the cable with other companies including Earthlink and AOL. IIRC AOL has left the broadband arena and now it's just EL and RR.
Bottom line: get earthlink cuz it's cheaper. No sense in paying more for the same exact service...