Android 2.2 USB Tethering with Motorola Droid on Windows XP: Device Disappears from DDMS (adb)

Following the instructions (http://www.android.com/tether#usb) is easy enough, but once I had the tethering working, I noticed that my device had disappeared from my Eclipse DDMS window. My attempts to restart Eclipse, toggle Tethering, and unplug/replug the USB cable did not help. Running ‘adb devices’ at the Command Prompt resulted in an empty list. However, restarting [...]