|  roundup |
Former executives of two titans of the telecommunications and computing industries are forging their own paths in the increasingly hot wireless market. | Â | Microsoft, McCaw executives start wireless investment firm update Brad Silverberg, a former Microsoft executive who led the development of Windows 95, will be chief executive of the new company, called Ignition. AT&T loses another executive to a start-up AT&T wireless president heads for start-up Previous coverage MCI WorldCom starts high-speed wireless trials |