Converting USB to wireless? Xbee?

I was wondering if it is possible to bypass the USB cable and connect a USB device to my computer wirelessly through xbee or even bluetooth.

I want to connect an old cell phone (no bluetooth) so I can send AT commands wirelessly. I basically want to mimic connecting it to my computer via a USB cable so I have full control of the device.

I know there are wireless keyboards, mouses, webcams, etc., can any usb device be made wireless?

Any clues or links how I can maybe set this up?

edit: Looks like it is possible. However I would like to make smaller unit via hands on, would it be very difficult?