I don't... McCain wants to put her a heartbeat away, and  she's dumb enough to use yahoo for official business and "off the record" scheming?

NYT, page 4 of the article.
"While Ms. Palin took office promising a more open government, her administration has battled to keep information secret. Her inner circle discussed the benefit of using private e-mail addresses. An assistant told her it appeared that such e-mail messages sent to a private address on a “personal device” like a BlackBerry “would be confidential and not subject to subpoena.”

http://www.nytimes.com/2008/09/14/us/politics/14palin.html?pagewanted=1&_r=1