Olympus introduced a new 300mm f4 lens today as a part of their PRO lineup. This lens can be attached to any m43 mount camera body from either Olympus or Panasonic and provides a 600mm field of view. One of the interesting features is that it provides 6 stops of stabilization (using both lens and body stabilization), more than any other telephoto lens.
http://www.dpreview.com/news/5022480704 ... -ever-lens
