I bought the "ISY USB Wireless Micro Adapter" for my Raspberry Pi's.
It's also called "IWL 2000" and supports the N150 standard. It is equipped with a blue led. It works with and without a powered USB HUB. It has a Belkin USB ID and a Realtek Chipset.
It doesn't work out of the box with Raspbian 2012-12-16 wheezy release.
But fortunately it's not hard to get it working:
The 8192cu driver included with raspbian does work, but is not linked with the USB ID of the device. The 8192cu is not the same as the rtl8192cu driver which is included in other releases. I'm using kernel 3.6.11+.
In the output of "lsusb" this is what's show for the device:
Bus 001 Device 006: ID 050d:11f2 Belkin Components
After an "sudo update-usbids" this is what's shown in "lsusb"
Bus 001 Device 004: ID 050d:11f2 Belkin Components ISY Wireless Micro Adapter IWL 2000 [RTL8188CUS]
To load the 8192cu kernel module:
echo 8192cu >> /etc/modules # this makes sure the driver gets loaded on startup
modprobe 8192cu # this loads the driver now
To add the USB ID to the driver:
echo "050d 11f2" > /sys/bus/usb/drivers/rtl8192cu/new_id
You should add this line to /etc/rc.local to make it persistent.
Now it should show up with "ifconfig" and "iwconfig" and you could configure it just like any other wifi interface.