MindSpring Enterprises and Covad Communications will offer asymmetric digital subscriber lines (ADSL), a high-speed Net access technology, this fall. The companies will offer ADSL in certain California and Texas markets. MindSpring and Covad recently announced a partnership for business services. Covad unveiled its first consumer ADSL offering in April. MindSpring also offers DSL with BellSouth in addition to cable modem service.