Maybe someone could take a dental x-ray of the USB pad area, better if the USB port has already fallen off. If the port area has no traces there is no reason that two or four holes could be drilled and one or two solid copper wires passed over the USB port pulled tight and soldered down to the port top, this will work especially well if there is good ground plane on the opposite side. I have used this before on several non-SM radio build projects to mount or strengthen components.
I am hoping to find a smoking deal on a broken N900(no way I could afford a new or working one) and I think epoxying down a 2mm charge port will make using the USB in host mode while keeping the battery and USB device powered much easier without weird Y cables. Of course that still leaves the problem of getting the charge logic to accept power without shorting the data pins. The plan is to get a 2mm power port and epoxy it on upside down and direct solder wires running to a convenient bit of ground and the +power from a SM cap near the left corner of the USB port. Does anyone have experience with switching to miniUSB as mentioned up the thread?
With the fragility even after a fix would anyone suggest charging while cycling?(I have no car but strong legs) I have a handlebar mount phone clamp similar to a car handsfree mount and a hub dynamo electrical power system with a clean 5vDC filtered USB electrical output that I have used on my current phone and my very old Zaurus.