Open source, so anyone can start developing...Dlink has uses propriety technology, so you can better address Silex (manufacturer).Unless they have something in Linux taste, you're on your own.
The Dlink USb port is not the same as the one in the Linksys. The USB port on the 655 was initially only intended (are most probably AFAIK ) designed for Windows Connect Now.
Check out the Silex Virtual link downloads (sorry, no linux): http://www.silexeurope.com/en/home/support/productgroups/common-downloads/device-server-and-virtual-link.html