Weirdest thing... pulled into a gas station, woke up the Droid to call my wife, tapped the screen in all the right places, but nothing. Tried to manually call, dialed ok, but nothing. Dead silence. I hit "end" and it beeped. Tried again, same thing.
Browser worked, maps worked, everything worked but the telephone.
Tried *228, it worked.
Tried to call wife's cell, then the home phone, but no luck
Got back to work, and everything's normal again. Working great.
A true "WTF" moment.