Technical complexity and financial naiveté have meant that London's ambitious plans to cover its underground train network with cellular signal by the 2012 Olympics are hitting the scrapheap. In spite of Huawei's most generous offer to provide £50 million ($81m) of equipment for the project for free, the London Mayor's wish that UK mobile operators be the ones to foot the installation bill -- without a penny coming out of public coffers -- has unsurprisingly found little favor. Compounded with the logistica