Apple has built in a special driver for the Keyspan remore and the function is also built into itunes.
I check on the net, and Apple really recommand to only connect 1 and only one printer, 1 and only one remote sensor, or both using a USB hub.
Other brands are selling wireless USB hubs. They use Wifi and USB. If drivers are available for the mac, I would get one of this, connect the Beoport on one USB port, a USB soundcard on another one.
http://www.gadgetell.com/tech/comment/belkins-next-gen-wi-fi-usb-hub/
http://www.griffintechnology.com/products/imic
p.