Anyway, she came recommended from a friend who was an aspiring FSO (and now is working in Bogota with me), and I can say that her patience, yet persistence, really helped me enormously. She is in Antigua, Guatemala (hence the Skype lessons), and has been teaching for 27 years, particularly with FS officers and aspiring FS officers and Peace Corps volunteers. And just anyone who wants to learn Spanish!
If you're interested, here are the details:
Maria Elena Guzman
maestrago at yahoo dot com
Her sessions are extremely reasonable and she has no end of patience.
Heck - she helped ME pass!