Many running Google+ Pages for their companies have likely been frustrated by the lack of interaction with some of their fans -- if visitors haven't already put the brand in a circle, they've been off-limits regardless of their interest. A quiet change may have just opened the floodgates. Pages can now share, comment on and +1 posts from those who weren't already followers. Google hasn't made the change official, but it is promising a feature that's ultimately complementary: Pages should get their own analytics for demographics and social activity in the "com
