WASHINGTON, March 28 - The parents of Terri Schiavo have authorized a conservative direct-mailing firm to sell a list of their financial supporters, making it likely that thousands of strangers moved by her plight will receive a steady stream of solicitations from anti-abortion and conservative groups. "These compassionate pro-lifers donated toward Bob Schindler's legal battle to keep Terri's estranged husband from removing the feeding tube from Terri," says a description of the list on the Web site of the firm, Response Unlimited, which is asking $150 a month for 6,000 names and $500 a month for 4,000 e-mail addresses of...