As for taxi drivers, are you talking about my Greek 'brother' Kostas? the best taxi driver in Greece?
I'll put up his business card again if anyone wants to use him while in Athens, hes reasonably priced and such a gentleman. He took me to the best places, churches and restaurants! If it wasn't for him I wouldn't have had such a nice time and seen so many beautiful things, he really knows his city. He speaks and writes good English, so email him and he will understand you.