I live in Canada and picked up one of these (the DIR-857 Media Router) today at "Future Shop'. The HW version is A1 and the shipping FW is v1.00 The unit itself has an FCC ID: KA2IR857MO1 The power supply brick is 12 volts 2 amps and is U/L approved. I don't see why you can't buy these in the US. You can probably source one from a Canadian supplier if you don't want to wait. The Future Shop store that I bought mine from had four in stock.
However, I'm having problems getting the unit to connect with my ISP (Shaw cable using a Motorola SB5102 cable modem). The DIR-857 can do gig-E on the internet port but the Motorola SB5102 only does 100 mbps and there may be a handshake problem. But that will be tomorrow's problem. *** Edit: Problem is now solved. Forced the DIR-857 to connect to my ISP using a static IP and forcing a 100 mbps connection. Once I had everything setup, I reverted to AUTO speed and DCHP for my ISP and everything is working. ***
In any case, the DIR-857 detects all my wireless devices and shows better connectivity percentages than does my existing DGL-4500. I hope the QOS inter-operability with my DAP-1522 bridges will actually work with this unit. (The DAP-1522 badly misbehaves and will not work with QOS turned on when communicating with my DGL-4500.)
There are issues with the FW. Some of the settings do not allow entry although they are displayed (they are greyed out). This is all too typical for new D-Link products... Hopefully new FW (when available) will rectify these shortcomings. ***Edit: Problem is solved. Some settings are dependent on other settings and after using some intelligent guesswork I was able to setup the device exactly the way I wanted to. ***
BTW: The unit looks just like the pictures on the D-Link products pages - very sleek.