I am about to try and share one USB device between two computers, unless otherwise directed. I am looking for wisdome, insight, sage advice, etc. to this end.
You can share one USB device between two computers using a 2-port USB switch. We do not sell these at National Instruments, so if you have any questions about them, contact the manufacturer. The following link shows some possible devices, although I would recommend looking around a little first: http://www.usbgear.com/USB-Sharing.html
Do not hesitate to contact National Instruments support and/or forums in the future with any questions about our hardware or software. Good luck getting your system working.