We were lucky enough to be able to attend one of the games during the Nationals inaugural season at RFK Stadium. The stadium is fairly large, and I believe it seats around 56,000 people ... not nearly as big as FedEx Field, but still a decent size. Parking and traffic around the stadium is horrible, of course, so if you live in the area try to take the metro instead. The game itself was a lot of fun ... the Nationals played the Braves and won. Food and drinks are a bit expensive, but that's pretty much to be expected at any sports venue. I'd highly recommend stopping in to see a game if you're in the D.C. area!