RealTex 8187 Chipset 400mw unit works out of the box
I went around looking for an Alfa brand USB dongle, as I've read here that they work out of the box.
The website I found was called data-alliance (.net). I simply clicked on Linux-Compatible on the left side of the screen, and they had a generic(?) dongle with the RealTek 8187 chip.
It was about $20 plus shipping.
In the box was the dongle, external antenna, and driver CD, including linux drivers. However, in BT4, I needed NO drivers at all. I simply booted up and started Kismet, and voila, it worked (as wlan0).
Out of Kismet, I ran NetworkManager in console. Then I used KNetworkManager to setup an actual internet connection (this time as ath0) to my house's wireless router.
I'm posting this now within BT4 to let you all know: IT WORKS!
are you able to drive the device to full power? if you do iwconfig wlan0 26 do you actually get the full 400mw (26db)?
I've the Alfa 27dbm and I can't get mine to go above 20dbm. I could in BT3. I'm guessing I need updated drivers.