Amazon listed the new cameras without price and availability (for now). But they will soon start to accept preorders.
The Olympus E-PL2 + 14-42mm lens will cost $599 and be available in February (Click here to see the product page on Amazon and here to see it at BHphoto).
The Olympus XZ-1 will cost $499 and be available soon (Click here to see the product page on Amazon and here to see it at BHphoto).