No, it's not "to/from", just "from"....Per the T&Cs:
Wait...why is not to/from?
AAdvantage promotion is valid for round-trip travel on eligible purchased, published fare tickets on American Airlines, American Eagle or AmericanConnection marketed and operated flights for trips that both
originate and terminate in Nashville (BNA) from July 2, 2010, through December 31, 2010.
I'm confused. I was looking at booking a Europe trip from the left coast later this year with a one night stay in Pitt/RDU/STL/BNA (same promo) before flying out.