http://planetside.station.sony.com/news_story.jsp?story=63898
On Friday, October 15th, Sony made this announcement: "BFR Mayhem is upon us! In anticipation of next week's release of PlanetSide: Aftershock, we're adjusting the servers so that EVERYONE can purchase BFRs (no certification requirements)."
Anyone who has the Core Combat expansion, now available for download for only $9.99, can go on a rampage in-game with the new Battleframes this week.
The event is scheduled to start sometime mid-day, Pacific time. The community should stay tuned to the forums for the final announcement that the Event has begun.