Preorders: Olympus 150-400mm lens at BHphoto, GetOlympus, Adorama.
Dpreview forum users Lauri (Click here) and Girish (Click here) shared their impressions and images samples about the new lens.
There is also a curios note via the German Oly Forum:
Delivery comes in the planned order of magnitude (~ 30 copies) – but it is currently stuck in customs at Frankfurt Airport.