Hello Carolyn,
I came across your blog by accident and have really enjoyed reading about your expat life.  I was wondering if you could give me some advice as I am considering taking a job as an expat teacher in Sofia.  I have been an expat teacher working in South America for 6 years and thought it was time for a change.  I had never thought about living in Eastern Europe so the whole idea is rather interesting.  What's life for a single American woman like in Bulgaria?  What is the weather like- especially winter?  How are the living expenses like?  
I appreciate any answers or extra information you can give me.
Happy Holidays,
Isabella