All western Nevada County residents could have broadband Internet service by 2010 - and people living in Sierra County could have complete coverage as early as this summer, said Gil Mathew, president of the county Economic Resource Council. A $240,000 grant from the California Emerging Technology Fund will pay for an aggregated broadband project being put into place by the Sierra Economic Development Corporation, based in Auburn. SEDCorp serves Nevada, Sierra, Placer and El Dorado counties. "By the end of 2010, we'd like to have broadband for every citizen in the county. That's how we're marching," Mathew said. Leaders throughout …