On the last day the public could comment on the Nantucket Sound wind farm project, the tally of responses yesterday was 3,500 and counting. But one voice remained silent: U.S. Sen. John Kerry's position is still unclear. In the years since the Cape Wind Associates proposal was first floated, U.S. Sen. Edward Kennedy has stated clearly his opposition. Gov. Mitt Romney and U.S. Rep. William Delahunt, the Cape's congressman, have too. But Kerry - Nantucket homeowner and the ranking Democrat on the Senate Subcommittee on Oceans, Fisheries, and Coast Guard - still has not taken a position about putting the...