SBC is slashing introductory pricing on its DSL service to about $19.95 per month. I get a feeling this is something other bells will follow-up on as well, and would be slashing prices as they feel the heat of resurgent cable companies’ and their discount plans. Only yesterday, we saw that both Cox and Comcast had super broadband quarters. Reuters reports that SBC added 402,000 residential high-speed Internet lines last quarter, bringing its total to 4.7 million and generating $578 million in consumer broadband revenues. This dial-up’s alamo?