It looks like you can see the lander, up in the air and casting a shadow on the surface in the 2nd image. If it is, you can get a good estimate of its horizontal velocity from the image timestamp.
That speck appears to be there in the first image as well, though not as bright...?
I wonder if Philae actually landed exactly where computed (the green square), and if so why the dark dust does not radiate from that spot, but "down-wards". Perhaps Philae hit the surface at an angle?
Did the lander somehow adjust itself while hovering away from the original landing site? I can't imagine Philae bouncing away, then flying for roughly one hour (?) and then landing on its feet.
Gravity exerts almost no torque here. Philae has 100 kg of inertia, but it weighs less than a feather.
Even if were in a strong gravity field, that still wouldn't orient it, if there's no force like air resistance to attenuate its tumbling. It can rotate indefinitely in the vertical plane: there's no loss of energy. (In an atmosphere, this rotation is damped by air drag, so gravity can orient things).
https://plus.google.com/app/basic/stream/z13gzxiwdkq2clyew22...