There was a minor packaging error in the 3.9.0 source tarball which would make bitfury code not fully compile support for bi*fury devices unless drillbit was enabled as well, so I've uploaded updated tarballs with only that one change, they will be tagged 3.9.0-1. There is no other change in this code so you do not need to update if everything's working for you.
I have been working on writing a nanofury driver (using direct USB communications as per our USB device driver model) but it is proving rather challenging so it appears that it will be some time before nanofury support is in mainline cgminer at this stage.

I meet a very troublesome problem,and I ask for your help.
My host OS: Win7 ultimate sp1(x64)
Graphics card: ATI Radeon HD 6850
When I mine many coins based on scrypt,cgminer can run smoothly in my host OS.But I want to place cgminer and all coin's wallets into a virtual machine now,because my antivirus software always prompts that there are many viruses in cgminer and some coin's wallets. So I installed VMware workstation(10.0.1 build-1379776) today,and converted my physical computer into a virtual machine by using "Virtualize a Physical Machine".
But cgminer can't run in the virtual machine,and it prompts "No devices found". So I am ready to install the graphics driver,but I find that the graphics driver can't be installed successfully at all in the virtual machine.
So,I want to know:
1: Can cgminer run smoothly in a virtual machine?
2: If it can,how should I set the virtual machine?
My cgminer is downloaded from the link:
http://ck.kolivas.org/apps/cgminer