A few weeks ago, Linnie Frank Bailey, a 51-year-old self-described "older soccer mom" in Corona, Calif., and Isaac Burbank, a 20-year-old mechanical engineering student at Colorado State University, both did something for the first time. They gave money to a political campaign -- $10 each to Sen. Barack Obama -- and they gave it over the Internet. About a third of the money Sen. Barack Obama raised in his record-setting haul of $32.8 million in the second quarter of this year came from donations made on the Internet, his campaign said. The Illinois Democrat's second-quarter fundraising haul of $32.8 million...