There's few issues that stir up more debate about Facebook than privacy and data use, and the social network has today proposed some changes to its policies that affect both. That includes a more public role for its Chief Privacy Officer, Erin Egan, who will both be at the center of a new "Ask the Chief Privacy Officer" feature that's said to be launching in the coming weeks, as well as a new series of live events where she'll address "comments and questions about privacy, safety and security." It's also proposing changes to its site governance process, including a shift away from its current voting method for feedback on policy c