Debbie Zachareas is one of my favorite sommeliers, and one of the 3 people I credit with my love of German and Austrian wine. (Reminder: I fell in love with these spectacular wines so much that I'll be teaching a class on the subject through UCB Extension, and you can still sign up for it).
The Chronicle has started running quick profiles of wine folks, and they started with Debbie, though those of you with long memories might say that they're restarting with Debbie: When the wine section was young they profiled sommeliers, and Debbie was the first one they picked.