Same here on an interior page of our site. Started Feb. 18, 2012. Google Analytics, Clicky, and Quantcast all show the increase, which is still occurring. Attached is a log (csv) with user agents for all visitors to that page that had no referrer, sorted by number of page views for the user agent, from a random period of time during today (2/27/2012). The log is of all page views, including some bots that don't show in GA.