By default, your phone is probably in charge only mode when connected via usb. After it's connected, pull down the notification shade and select the usb connected notification. This will take you to a screen where you can change it to the proper mode.
As usual, it was an 'OMG, I did that?" mistake. I picked up the wrong charger cord. I used the cord from my old LG basic phone. It charged the Droid just fine. When I noticed what I had done, I switched to the correct Droid usb/charger cord and my computer recognized my phone as soon as I plugged it into the computer.
Ya gots to be smarter than the machinery...........