Sales of Apple Computer Inc’s new RISC-based Power Macintoshes are running ahead of expectations in many computer stores, the Wall Street Journal reported: some outlets say they are sold out of some models; Ingram Micro Inc, Santa Ana, California reports its stock of Power Macintoshes wasn’t enough to meet demand, and that it has a small backlog of orders, adding that Apple brought Power Macintosh to market when it said it would, and that customers report few problems running the machines; Apple would say only We are very happy with the way things are going.