You can get broadband with Earthlink, which is what I have. I'm not sure if they have their own hardware/servers or not, or if they are just reselling RoadRunner. I pay my bill to TW cable, who I guess collects for Earthlink.
I found this tidbit: (AOL/TimeWarner merger)
As part of the FTC approval, AOL and Time Warner agree to a number of measures to protect competitiveness. On of these measures is the request to open Time Warner's cable TV lines to competitive ISPs. Time Warner complied by forging and agreement with Earthlink, AOL's #1 competitor, to allow Earthlink access to Time Warner's cable customers.
So I get Earthlink basically via TW cable, cheaper, and with more email accounts and web space... speed is the same...