This 802.11n wireless card does not work in Backtrack 4 pre-final, nor in Ubuntu Karmic. When plugged in, the computer detects that something has been plugged in, but nothing else happens. I did some research and it seems like the card in question comes with a fairly new Ralink chipset. At the time of this writing I was unable to locate any linux-based drivers for the chipset in question.
Device: Linksys WUSB600N v2
Dmesg output upon hotplugging:
lsusbusb 1-1: new high speed USB device using ehci_hcd and address 3
usb 1-1: configuration #1 chosen from 1 choice
Bus 001 Device 003: ID 1737:0079 Linksys