Devices which are not listed could be working fine anyway. It is not possible for us to test any type of USB device on the market, the listed devices are tested and guaranteed to be working fine. Other devices are just not yet tested, but might work fine anyway.

The SX-DS-4000U2 is the next generation of USB device server. Any device tested to be compatible with SX-3000GB, SX-2000U2, SX-2000WG, SX-1000U should also work fine.
supported devices SX-DS-4000U2
USB soundcards (updated 22.11.2011)
Creative Soundblaster Play (tested on Windows XP and Windows 7, fw 1.0.0, SX-VL 3.7.2) Soundblaster application not supported. Sound works.
Asus Xonar U3 (tested on Windows XP and Windows 7, fw 1.0.0, SX-VL 3.7.2)
LogiLink USB Soundkarte with Virtual 7.1 sound effect (tested on Windows XP and Windows 7, fw 1.0.0, SX-VL 3.7.2)
Terratec Areon Dual USB (tested on Windows XP and Windows 7, fw 1.0.0, SX-VL 3.7.2)
Webcams (updated 22.11.2011)
Logitech Quickcam C200 (tested on Windows XP and Windows 7, fw 1.0.0, SX-VL 3.7.2)
Logitech Quickcam Pro 9000 (P/N 861464-0000, PIDLZ748BR) (tested on Windows XP and Windows 7, fw 1.0.0, SX-VL 3.7.2)
Scanner (updated 17.01.2012)
Canon DR-M140 and flatbed unit 101 (tested on Windows XP SP3, Windows 7 32bit fw 1.0.0, SX-VL 3.8.0)
Canon DR-2510C and flatbed unit 101 (tested on Windows XP SP3, Windows 7 32bit fw 1.0.0, SX-VL 3.8.0)
Fujitsu fi-60F (tested on Windows XP SP3, Windows 7 32bit fw 1.0.0, SX-VL 3.8.0)
Fujitsu fi-6130Z (tested on Windows XP SP3, Windows 7 32bit fw 1.0.0, SX-VL 3.8.0)
Fujitsu fi-6230Z (tested on Windows XP SP3, Windows 7 32bit fw 1.0.0, SX-VL 3.8.0)
Fujitsu fi-6140Z (tested on Windows XP SP3, Windows 7 32bit fw 1.0.0, SX-VL 3.8.0)
Fujitsu fi-6240Z (tested on Windows XP SP3, Windows 7 32bit fw 1.0.0, SX-VL 3.8.0)