Sony NEX pricing for the US is out. Many color/kit lens combinations are available @ Adorama (just search for Nex 3 or Nex 5). All prices are in the $549 to $699 range, for example:
Other product availability: Panasonic G10 and Panasonic G2 are also available for pre-order. The new Sigma 8-16mm g/4.5-5.6 DC HSM is now in stock.