On the broadcast networks, Gov. Sarah Palin's acceptance speech at the Republican National Convention Wednesday night drew a bigger audience than last week's address by Sen. Barack Obama at the Democratic National Convention, according to preliminary ratings by Nielsen Media Research. The 10 00 p.m. hour, which included Palin's introduction by former New York Mayor Rudolph Giuliani, posted a 5.4 rating and an 8 share (7.72 million viewers) on NBC; a 4.0/6  (5.05 million) on ABC and a 3.1/5 (4.63 million) on CBS. Earlier in the evening, the season premiere of Fox's Bones attracted an average 9.69 million viewers, dominating the two-hour period.