Hi Fenton,
I seriously doubt it will work - but if the chipset of the dongle is based on Broadcom BCM4323 then a chance exists it might.
I tried a Zoom Telephonics wireless USB dongle and it didn't.
Thing is I know of no way for us mere operators to update the USB dongle driver included in the firmware of the TV. We are limited to the driver supplied by Panasonic in the firmware.

- If we had the ability to install drivers then it would be different and we would be able to use any dongle we wanted in much the same way we can add one to a PC - but then Panasonic would lose the ability to Price Gouge us on the dongles [£79 for the official one, thats just urine extraction

] and restrict our choice of hardware e.g. usb camera for Skype have you seen the price of those

.
Come on Panasonic open up the driver installation .