As is typical of Olympus they hit a home run with a new lens, something that they are known for. Scott Bourne's review of this new micro 4/3rd lens, that can be used with many of the micro 4/3rd cameras including Olympus' PEN, is above. Scott is a famous avian photography by the way, who has used both Nikon and Canon all of his career.
I don't see the compact class of cameras, which includes the Olympus PEN, being used for serious sports work, not yet anyway... But for others forms of photography these inter-changable lens compacts, made by all the manufacturers, are looking good!
The "SECOND UPDATE" part of the blog is telling, low weight, small size and ease of transport are a big deal particularly when coupled with fast prime glass... typically around F/1.8 with a third party lens at F/0.95. Anyone new to photography should seriously consider this type of camera.
Where will this all end? I hope in a much more usable camera for all of us.