I have been trying to get adb working on my NookColor under Windows 7. I am running a rooted 1.4.2 stock image. I installed the sdk by following the guide at http://nookdevs.com/NookColor_USB_ADB, but when I get to step III.3.1, the device does not show up where the guide tells me it should. I gget a myNOOKcolor device under Portable Devices instead. I tried following the same procedure for this device, but when I get to step III.3.2.3, I get an error message saying "The folder you specified doesn't contain a compatible software driver for your device. If the folder contains a driver, make sure it is designed to work with Windows for x64-based systems."
I was able to follow the same procedure to install the driver for my MyTouch 4g. It looks to me like the problem s that Windows identifies my Nook as a portable storage device, rather than an unidentified device type, like my MyTouch was. I've tried uninstalling the driver, but it just reinstalls itself when I unplug and plug the device back in.
Any suggestions would be greatly appreciated.