Exclusive: Apple Computer is working feverishly on the design of a new Macintosh computer that the company hopes will strengthen its position in the education sector when it goes on sale later this year, AppleInsider has learned. The new low-cost PC, which will act as a replacement for Apple's now defunct eMac line, appears to be on track to catch the latter half of the 2006 educational buying season. Based on a series of proprietary checks, it's believed that the Cupertino, Calif.-based company is aligning component suppliers for a manufacturing ramp of the computers that it plans to initiate around...