Three weeks ago, I blogged about how I used VMWare and Ubuntu to develop and debug Android applications on my Windows Server 2008 x64 installation. I had to do this because Google did not write a 64 bit ADB driver for Windows. Thankfully, since the entire Android platform is open source, aziwoqpd from xda-developers undertook the task of porting the 32 bit drivers to a 64 bit platform. Been playing with with this for a bit, and it's been working great! Now all that's left is for someone to port the repo command to Windows, and I can get rid of this Ubuntu VM altogether.
Visit the linked forum post for the driver download.
Open source gives me a warm fuzzy feeling sometimes. But I still think GPL is lame.