This is how i attached the receiver to the n900 - probably need to attach it with something that looks a bit better than a simple duck tape, to look more like a natural part of the back cover (any idea how?), but this is just for the sake of testing.

it works nicely, i need to be a little accurate when placing the phone on the wireless charger but it charges ok (with kp52 modules).

only issue right now is that for some reason the device gets really hot after something like an hour - above 60 degrees, and i don't know how to overcome that.

another cosmetic change is to pass the microusb wire inside the cover by doing a hole in it - this way it will not block the phone holder from around the camera from opening.