* EarthLink Inc. plans to offer its subscribers software to block Internet pop-up advertisements. The Atlanta-based Internet service provider also will block so-called pop-under ads. Shares rose 56 cents to $6.63 on Nasdaq.
* Cingular Wireless, the second-biggest U.S. mobile-telephone company, will let users nationwide keep unused monthly minutes. The joint venture of SBC Communications Inc. and BellSouth Corp. is the first U.S. mobile-phone service to offer a national rollover plan. BellSouth rose 93 cents to $26.71 and SBC gained $1.18 to $29.87, both on the NYSE.