One of the most important trends in the current reinvention of the mobile network is the introduction of open source to infrastructure hardware. Open source processes have been creeping into this formerly tightly closed world in software (from Android to carrier Linux) and in devices, but the network equipment itself remained the preserve of proprietary vendors and formal standards bodies. Now that is changing. From small innovators like Lime Microsystems (see separate item), to entrenched guardians of the old ways, like Nokia, suppliers are finding new ways to work with open source. This could finally spark the revolution in the cost of mobile data delivery, which has been so often discussed and so little delivered. New architectures, standardized interfaces, the…