Via VT6656 USB WiFi has been out-of-tree because of non-GPLness. The new driver is a candidate for inclusion supposedly but for now you need to build your own driver in most cases. I want it for Debian 5 on my DT360.
The biggest problem is getting enough of the system to compile the driver without having to download full kernel sources and patching them to current. The answer is in section 4 of the Debian Linux Kernel Handbook.
Download the source, unpack it, and run the following:
sudo aptitude install linux-headers-`uname -r` build-essential
(If you're trying to build stuff you probably already installed build-essential, but I include it here for the newbies)
Once this is done you can just run sudo make to get a driver (needs root at one point) or sudo make install to install it. driver/vntwusb.ko gets installed to
/lib/modules/`uname -r`/kernel/drivers/net as root with mode 644. Run
depmod -a and you should be able to
modprobe vntwusb. The result on my Dt360 is an ethn device (in this case eth0) and a device called
Both the prior (1.19) and current (1.20) driver work fine as far as I can tell. Wifi, here I am!